CN113633064A

CN113633064A - Insole, footwear product, three-dimensional data processing method and 3D printing method

Info

Publication number: CN113633064A
Application number: CN202010345394.XA
Authority: CN
Inventors: 邹波; 吴金生; 潘海文; 赵小龙; 刘松松
Original assignee: Chushi Intelligent Technology Shanghai Co ltd
Current assignee: Shanghai Renmi Intelligent Technology Co ltd
Priority date: 2020-04-27
Filing date: 2020-04-27
Publication date: 2021-11-12

Abstract

The application discloses a shoe insole for a shoe product, the shoe product, a three-dimensional data processing method and equipment and a 3D printing method, wherein a topological structure or a lattice structure is adopted as a supporting structure of the shoe insole, in the model design of the shoe insole, the pressure distribution state of the shoe insole suitable for a target user is determined based on the analysis of various physical functions, medical data and foot contour data of the target user, the topological structure or the lattice structure strength corresponding to the shoe insole is determined to carry out structure design and the three-dimensional contour design of the shoe insole, so that the shoe insole distributes the sole pressure of the target user according to a preset pressure regulation mode, and the distribution regulation of the sole pressure of the target user can be realized based on the specific requirements of the target user.

Description

Insole, footwear product, three-dimensional data processing method and 3D printing method

Technical Field

The present application relates to the field of footwear manufacturing technologies, and in particular, to a midsole for a footwear, a three-dimensional data processing method and apparatus, a 3D printing method, and a computer-readable storage medium.

Background

The human foot can experience and dissipate impact forces, fat filling at the forefoot and heel, and a flexible arch connecting the forefoot and heel, all contributing to foot shock absorption. In daily life, the footwear provides protection for the feet of a human body, and the structure of the footwear which is in direct contact with the feet influences the shock absorption and buffering functions of the feet, the comfort of the human body and the nursing of the feet. In some particular cases, the configuration of the article of footwear may also be used to achieve foot correction, such as for subjects requiring relief of painful or disabled conditions of the foot, where the article of footwear for foot correction requires specific design, manufacture, assembly, and modification.

In the conventional shoe manufacturing, the insole arranged in the shoe is used as a pressure reducing means, the sole is buffered by removing the selected part of the insole, the adjusting effect on the specific personal physical state and the requirement of a user is poor, and the sole adjusting mode aiming at pressure reduction of the general population is also determined by experience and has lower utility.

Disclosure of Invention

In view of the above-mentioned shortcomings of the related art, the present application aims to provide a midsole of a footwear product, a modeling method thereof, and a 3D printing method, so as to solve the problem in the prior art that it is difficult to achieve the foot pressure adjustment for a target user through the footwear product.

To achieve the above and other related objects, the present application provides in a first aspect a midsole for an article of footwear, the midsole consisting of a 3D printed topology or a plurality of lattice structures, comprising: the sole part is positioned between the heel part and the sole part and corresponds to the arch of the target user; the heel part and/or the sole part in the midsole is provided with at least one first foot pressing pre-region, and the topological structure or the lattice structure outside the first foot pressing pre-region is in gradual transition towards the topological structure or the lattice structure extending into the at least one first foot pressing pre-region, so that the stress intensity of the topological structure or the lattice structure in the at least one first foot pressing pre-region is smaller than that of the topological structure or the lattice structure outside the at least one first foot pressing pre-region.

In certain embodiments of the first aspect of the present application, at least one second foot preparation area is provided in the midsole, the second foot preparation area being located in a heel, a ball, or a pit portion of the midsole; the topological structure or the lattice structure outside the second foot pressing pre-region is in gradual transition towards the topological structure or the lattice structure extending into the at least one second foot pressing pre-region, so that the stress intensity of the topological structure or the lattice structure in the at least one second foot pressing pre-region is greater than that of the topological structure or the lattice structure outside the at least one second foot pressing pre-region.

In certain embodiments of the first aspect of the present application, the midsole maintains a predetermined thickness associated with at least one of measured body data, weight data, foot contour data, gait data, and foot pressure data of the target user.

In certain embodiments of the first aspect of the present application, the force strength of the topological structure or lattice structure in the at least one first foot drying pre-region or/and second foot drying pre-region is correlated with calculated expected foot pressure data, wherein the expected foot pressure data is less than the measured foot pressure data corresponding to the at least one first foot drying pre-region; the expected foot pressure data is greater than measured foot pressure data corresponding to the at least one second foot pressure intervention region.

In certain embodiments of the first aspect of the present application, the desired foot pressure data is calculated based on measured foot pressure data of the target user obtained by measurement and corresponding medical intervention data.

In certain embodiments of the first aspect of the present application, the force strength of the topological or lattice structure in the at least one first foot preparation area or/and second foot preparation area is correlated to the calculated desired foot pressure data and the measured foot shape profile data.

In certain embodiments of the first aspect of the present application, the force strength of the topological or lattice structure in the at least one first foot preparation region or/and second foot preparation region is related to the calculated expected foot pressure data, the measured foot shape profile data, and the gait data.

In certain embodiments of the first aspect of the present application, the waist socket portion has a raised portion with a predetermined height for supporting the arch of the foot of the target user, and the height of the raised portion and the force intensity thereof are related to the calculated expected foot pressure data and foot shape contour data and gait data of the target user.

In certain embodiments of the first aspect of the present application, the topological or lattice structure is obtained by 3D printing of one of filament melt extrusion, droplet ejection of material, lay-up melting of powder, binder ejection, or curing of a photosensitive resin laminate.

In certain embodiments of the first aspect of the present application, the material of the topological or lattice structure comprises a light-cured resin material, a thermoplastic rubber (TPR), a thermoplastic elastomer; wherein the thermoplastic elastomer comprises polyurethane elastomer (TPU), nylon elastomer (TPAE), polyester elastomer (TPEE), EVA elastomer and organosilicon elastomer.

In certain embodiments of the first aspect of the present application, the force strength of the lattice structure is determined by at least one of the bulk density of each lattice structure, the lattice bulk structure, the printing material, the printing process, and the post-processing process; or the stress intensity of the topological structure is determined by at least one of the volume density, the printing material, the printing process and the post-processing process of the topological structure.

In certain embodiments of the first aspect of the present application, the bulk density of the lattice structure is related to the rod diameter thickness, lattice wall thickness, lattice size, and density of the lattice rod after molding; and the volume density of the topological structure is related to the thickness of the rod diameter of the topological structure, the thickness of the wall surface and the density of the rod body or the surface body of the formed topological structure.

In certain embodiments of the first aspect of the present application, the gradual transition is formed by determining at least one of a bulk density, a lattice bulk structure, a printed material, a printed process, and a post-treatment process of the lattice structure outside the first foot press pre-region toward the lattice structure inside the at least one first foot press pre-region and/or at least one of a bulk density, a lattice bulk structure, a printed material, a printed process, and a post-treatment process of the lattice structure outside the second foot press pre-region toward the lattice structure inside the at least one second foot press pre-region.

In certain embodiments of the first aspect of the present application, the gradual transition is formed by determining at least one of a bulk density of the topology outside of the first foot press preparation region toward the topology inside the at least one first foot press preparation region, a printing material, a printing process, and a post-treatment process and/or at least one of a bulk density of the topology outside of the second foot press preparation region toward the topology inside the at least one second foot press preparation region, a printing material, a printing process, and a post-treatment process.

In certain embodiments of the first aspect of the present application, the midsole further comprises an upper faying surface integrally formed by 3D printing on a top surface of the midsole for engaging an upper.

In certain embodiments of the first aspect of the present application, the midsole further comprises a cushioning layer integrally formed by 3D printing between the midsole and the upper conforming surface.

In certain embodiments of the first aspect of the present application, the midsole further comprises a cushioning layer integrally formed by 3D printing on a top surface of the midsole.

In certain embodiments of the first aspect of the present application, the buffer layer is comprised of a 3D printed topology or a plurality of lattice structures, the stem diameter of the topology in the buffer layer being smaller than the stem diameter of the topology in the midsole; or the rod diameter of the lattice structure in the buffer layer is smaller than that of the lattice structure in the midsole.

In certain embodiments of the first aspect of the present application, the buffer layer is comprised of a plurality of lattice structures printed in 3D, the diameter of the rods of the lattice structures in the buffer layer is less than the diameter of the rods of the lattice structures in the midsole, and the lattice volume of the lattice structures in the buffer layer is less than the lattice volume of the lattice structures in the midsole.

In certain embodiments of the first aspect of the present application, the midsole further comprises a lower conforming surface formed by 3D printing on a bottom portion of the midsole for bonding to an outsole.

In certain embodiments of the first aspect of the present application, the lower conforming surface is in an annular configuration along a bottom contour of the midsole.

In certain embodiments of the first aspect of the present application, the geometry of the 3D printed plurality of lattice structures has periodicity, and the lattice structures are in tensile, torsional, or compressive deformation configurations at different locations.

In certain embodiments of the first aspect of the present application, the geometric structure comprises a combination of one or more of a polyhedron, a face, a cone, a rhomboid, a star, and a spheroid.

The present application also provides in a second aspect an article of footwear comprising a midsole as described in any of the embodiments of the first aspect of the present application, an upper bonded to the midsole top periphery for wrapping around the foot of an intended user, and an outsole bonded to the bottom of the midsole for contacting the ground.

In certain embodiments of the second aspect of the present application, the size or relaxation of the upper is related to foot contour data of the target user and/or gait data of the target user obtained from measurements.

In certain embodiments of the second aspect of the present application, the article of footwear is an orthopedic shoe.

In certain embodiments of the second aspect of the present application, the orthopedic shoe is a diabetic foot shoe.

The present application also provides, in a third aspect, a three-dimensional data processing method for a midsole of an article of footwear, the three-dimensional data processing method comprising the steps of: modeling a midsole of a target user to form a three-dimensional midsole model having a preset contour; the three-dimensional midsole model includes: the sole part is positioned between the heel part and the sole part and corresponds to the arch of the target user; processing the three-dimensional midsole model using the obtained foot pressure data and foot shape profile data for the target user to determine at least one first foot drying area in a heel and/or a ball portion of the three-dimensional midsole model; weakening the stress intensity of the topological structure or the lattice structure in the at least one first foot drying area to be smaller than the stress intensity of the topological structure or the lattice structure outside the at least one first foot drying area; processing the stress intensity of the topological structure or the lattice structure in the at least one first foot pressing pre-region and the stress intensity of the topological structure or the lattice structure outside the first foot pressing pre-region, so that the stress intensity of the topological structure or the lattice structure outside the first foot pressing pre-region is in gradual transition towards the change of the stress intensity of the topological structure or the lattice structure extending in the at least one first foot pressing pre-region; three-dimensional slicing data of the midsole readable by a 3D printing device is formed.

In certain embodiments of the third aspect of the present application, the three-dimensional data processing method further comprises the steps of: processing the three-dimensional midsole model using the obtained foot pressure data and foot shape profile data of the target user to determine at least one second foot pressure intervention region in the three-dimensional midsole model; strengthening the stress intensity of the topological structure or the crystal lattice structure in the at least one second foot pressing dry area to be larger than the stress intensity of the topological structure or the crystal lattice structure outside the at least one second foot pressing dry area; and processing the stress intensity of the topological structure or the lattice structure in the at least one second foot pressing pre-region and the stress intensity of the topological structure or the lattice structure outside the second foot pressing pre-region, so that the stress intensity of the topological structure or the lattice structure outside the second foot pressing pre-region is in gradual transition towards the change of the stress intensity of the topological structure or the lattice structure extending in the at least one second foot pressing pre-region.

In certain embodiments of the third aspect of the present application, the three-dimensional data processing method further comprises: and adjusting the preset thickness of the three-dimensional insole model according to at least one of the measured body data, weight data, foot shape profile data, gait data or foot pressure data of the target user.

In certain embodiments of the third aspect of the present application, the foot pressure data and foot shape profile data of the target user are obtained by measurement or statistics.

In certain embodiments of the third aspect of the present application, the force strength of the topological structure or lattice structure in the at least one first foot drying pre-region or/and the second foot drying pre-region is correlated with the calculated expected foot pressure data, which is less than the measured foot pressure data corresponding to the at least one first foot drying pre-region; the expected foot pressure data is greater than measured foot pressure data corresponding to the at least one second foot pressure intervention region.

In certain embodiments of the third aspect of the present application, the desired foot pressure data is calculated based on measured foot pressure data of the target user obtained by measurement and corresponding medical intervention data.

In certain embodiments of the third aspect of the present application, the step of weakening the stress intensity of the topology or lattice structure in the at least one first foot drying region or the step of strengthening the stress intensity of the topology or lattice structure in the at least one second foot drying region, the stress intensity of the topology or lattice structure in the at least one first foot drying region or/and second foot drying region is correlated with the desired foot pressure data obtained by calculation and the foot shape profile data obtained by measurement.

In certain embodiments of the third aspect of the present application, in the step of weakening the stress strength of the topology or lattice structure in the at least one first foot drying region or strengthening the stress strength of the topology or lattice structure in the at least one second foot drying region, the stress strength of the topology or lattice structure in the at least one first foot drying region or/and second foot drying region is correlated with the desired foot pressure data obtained by calculation and the foot shape profile data obtained by measurement, and the gait data.

In certain embodiments of the third aspect of the present application, the three-dimensional data processing method further includes the step of determining the height of the raised portion of the waist pad and the force intensity thereof; wherein the height of the raised part of the waist socket part and the stress intensity thereof are related to the expected foot pressure data and foot shape contour data and gait data of the target user obtained by calculation.

In certain embodiments of the third aspect of the present application, the three-dimensional data processing method further comprises the step of building a top-fit model on a top surface of the three-dimensional midsole model.

In certain embodiments of the third aspect of the present application, the three-dimensional data processing method further includes the step of constructing a buffer layer model between the three-dimensional midsole model and the upper attached surface model using a plurality of basic cells that are preset in a lattice structure or using a topology.

In certain embodiments of the third aspect of the present application, the three-dimensional data processing method further comprises the step of constructing a cushioning layer model on a top surface of the three-dimensional midsole model.

In certain embodiments of the third aspect of the present application, the three-dimensional data processing method further comprises the step of constructing a lower conforming surface model on a bottom surface of the three-dimensional midsole model.

In certain embodiments of the third aspect of the present application, the step of modeling the midsole of the target user has the lattice structure in a tensile, torsional, or compressive deformation configuration at different locations of the three-dimensional midsole model.

In certain embodiments of the third aspect of the present application, the geometry of the lattice structure comprises a combination of one or more of polyhedra, faceplates, cones, rhombohedra, stars, and spheroids.

The fourth aspect of the present application further provides a 3D printing method applied to a 3D printing apparatus, where the 3D printing apparatus includes: an energy radiation device for radiating energy to a printing surface, and a component platform for carrying a three-dimensional object cured by the energy radiation, the 3D printing method comprising: reading the three-dimensional slicing data of the midsole obtained by the processing in the three-dimensional data processing method of the midsole for the footwear according to any one of the embodiments of the third aspect of the present application; adjusting the spacing between the component platform and the print surface to fill the print surface with material to be cured; wherein the thickness of the filled material to be solidified corresponds to the slice layer height of the three-dimensional slice data of the insole; radiating energy to the filled material to be cured based on the midsole three-dimensional slice data to obtain a corresponding pattern cured layer; repeating the above steps to accumulate the patterned cured layer on the member platform to form a midsole for the article of footwear corresponding to the three-dimensional midsole model.

The fifth aspect of the present application further provides a computer device, including: a storage device for storing at least one program, and a three-dimensional midsole model; and the processing device is connected with the storage device and used for executing the at least one program so as to call the at least one program in the storage device to execute and realize the three-dimensional data processing method for the midsole of the footwear product according to any embodiment of the third aspect of the application.

The sixth aspect of the present application also provides a computer-readable storage medium, characterized by storing at least one program which, when executed by a processor, implements a method of processing three-dimensional data for a midsole of an article of footwear according to any one of the embodiments of the third aspect of the present application.

In summary, the midsole of the footwear product, the modeling method thereof, and the 3D printing method provided by the present application have the following beneficial effects: by adopting the topological structure or the lattice structure as the supporting structure of the insole, in the model design of the insole, the pressure distribution state of the insole suitable for the target user is determined based on the analysis of various physical functions, medical data and foot contour data of the target user, so that the intensity of the topological structure or the lattice structure corresponding to the insole is determined to carry out structural design, manufacturing process design and preset thickness design of the insole, thereby realizing that the insole distributes the sole pressure of the target user according to a preset pressure regulation mode, namely realizing the distribution regulation of the sole pressure of the target user based on the specific requirements of the target user.

Drawings

The specific features of the invention to which this application relates are set forth in the appended claims. The features and advantages of the invention to which this application relates will be better understood by reference to the exemplary embodiments described in detail below and the accompanying drawings. The brief description of the drawings is as follows:

FIG. 1 illustrates a schematic view of a midsole of the present application in one embodiment.

Fig. 2a is a schematic perspective view of a lattice structure of the midsole of the present application in one embodiment.

Fig. 2b is a schematic plan view of an embodiment of the lattice structure of the midsole of the present application.

Fig. 2c shows a schematic perspective view of the lattice structure of the midsole of the present application in one embodiment.

Fig. 2d shows a schematic plan view of an embodiment of the lattice structure of the midsole of the present application.

Fig. 2e shows a schematic plan view of a part of a region in an embodiment of the topology of the midsole of the present application.

Figure 3a illustrates a bottom view of a midsole of the present application in one embodiment.

Figure 3b illustrates a bottom view of the midsole of the present application in one embodiment.

Fig. 4a is a schematic perspective view of a lattice structure of a midsole of the present application in one embodiment.

Fig. 4b is a schematic plan view of an embodiment of the lattice structure of the midsole of the present application.

FIG. 4c shows a schematic plan view of one embodiment of the topology of the midsole of the present application.

Fig. 5 is a graph showing a distribution of measured plantar pressure in one embodiment of the midsole of the present application.

FIG. 6 illustrates a desired distribution of plantar pressure in one embodiment of the midsole of the present application.

FIG. 7 illustrates a side view of a midsole of the present application in one embodiment.

FIG. 8 illustrates a partial structural view of a midsole of the present application in one embodiment.

FIG. 9 is a schematic exploded view of an article of footwear of the present application in one embodiment.

FIG. 10 is a simplified structural schematic diagram of an article of footwear of the present application in one embodiment.

FIG. 11 is a flow chart illustrating a three-dimensional data processing method for a midsole of the present application in one embodiment.

FIG. 12 is a flow chart illustrating a 3D printing method of the midsole of the present application in one embodiment.

FIG. 13 is a simplified block diagram of a computer device according to an embodiment of the present application.

Detailed Description

The following description of the embodiments of the present application is provided for illustrative purposes, and other advantages and capabilities of the present application will become apparent to those skilled in the art from the present disclosure.

In the following description, reference is made to the accompanying drawings that describe several embodiments of the application. It is to be understood that other embodiments may be utilized and that compositional, structural, and operational changes may be made without departing from the spirit and scope of the present disclosure. The following detailed description is not to be taken in a limiting sense, and the scope of embodiments of the present application is defined only by the claims of the issued patent. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Spatially relative terms, such as "upper," "lower," "left," "right," "lower," "below," "lower," "above," "upper," and the like, may be used herein to facilitate describing one element or feature's relationship to another element or feature as illustrated in the figures.

Also, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes" and/or "including," when used in this specification, specify the presence of stated features, steps, operations, elements, components, items, species, and/or groups, but do not preclude the presence, or addition of one or more other features, steps, operations, elements, components, species, and/or groups thereof. The terms "or" and/or "as used herein are to be construed as inclusive or meaning any one or any combination. Thus, "A, B or C" or "A, B and/or C" means "any of the following: a; b; c; a and B; a and C; b and C; A. b and C ". An exception to this definition will occur only when a combination of elements, functions, steps or operations are inherently mutually exclusive in some way.

In the conventional footwear manufacturing, the height of the sole is usually adjusted appropriately based on the user's needs, for example, comfort, and the sole is set to have a heel slightly higher than a half sole of the sole, for example, so as to adapt to a walking force-generating manner in which a person usually lands after walking. Or, in some scenes, in order to protect the foot by the footwear, a material with good elasticity such as EVA is selected to realize sole shock absorption in the sole manufacturing process, and the contact area of the sole can be increased during movement based on the elastic deformation of the material, so that partial pressure and the like can be realized.

However, the distribution of the sole pressure of a human body is often related to the physiological state and gait habit of an individual, and meanwhile, the proper sole pressure distribution of different individuals in a static state and a moving state is different, so that the uniformly manufactured footwear is difficult to meet the specific requirements of the individual of the user. For a certain number of similar target user groups, a suitable foot pressure adjustment mode also requires data analysis as a scientific basis, for example, according to specific information of such user groups: the sole contour, the weight, the medical data and the like determine the expected pressure state suitable for the user, so that the pressure distribution is favorable for the correction of the foot shape of the human body and the comfort level of wearing.

Referring to FIG. 1, a schematic view of a midsole for an article of footwear of the present application in one embodiment is shown, comprising: a rear heel portion 13 corresponding to the heel of the target user, a sole portion 11 corresponding to the forefoot of the target user, a waist portion 12 corresponding to the target user connecting the rear heel portion and the sole portion, the waist portion 12 being provided with a raised portion 121. The heel portion 13 corresponds to a tread portion of a heel of the target user, and the sole portion 11 corresponds to a tread portion of a sole of the target user.

Wherein the target user may be a user of the article of footwear, and in the embodiments provided herein, manufacturing information for the midsole, such as material information, midsole structure information, manufacturing process information, etc., is formed based on the target user's specific information.

The specific information of the target user is acquired by acquiring the personal physical state and the requirement of the target user and analyzing the acquired information, and is used for indicating the personalized information of the insole structure design. Or, for a certain type of target user group, the specific information of the target user is obtained from the big data for the group, here, the characteristics of the big data are analyzed, and the general rule expressed by the data determines the manufacturing information of the insole suitable for the target user group, such as: for target users with diabetes, diabetic feet, namely plantar ulceration and callus caused by diabetes, are generally easy to suffer; based on medical analysis and statistics of the soles of medically corresponding diabetic foot patients, for a target user group of the diabetic patients, for the diabetic patients with no obvious lesions such as calluses on the soles, the protective areas of the soles can be predetermined based on medical statistical analysis.

At least one first foot pressing and drying area is arranged in the area corresponding to the sole part 11 and the heel part 13, and the stress strength of the topological structure or the lattice structure in the first foot pressing and drying area is smaller than that of the topological structure or the lattice structure outside the first foot pressing and drying area. In some embodiments, the first foot press preparation region is disposed in the ball or heel region, or both. As shown in fig. 1, the sole portion 11 of the midsole is provided with a first foot drying preparation region 111 and another first foot drying preparation region 112, and the heel portion is provided with a first foot drying preparation region 131.

The first foot pressing and drying area can be determined according to specific requirements of the target user, for example, an area where pressure needs to be dispersed and transferred, such as a designated protection part of a foot, a foot ulcer part, and the like, or another area where pressure needs to be adjusted and dispersed based on requirements of comfort or protection of a sole, and the specific position of the area can be further determined based on the foot shape profile and the specific requirements of the target user. In some examples, the lattice structure in the first foot drying pre-region is different from the lattice structure basic unit form outside the first foot drying pre-region, so that the pressure of the insole is naturally distributed with a preset effect when a human body presses and bears the weight.

The topological structure or the lattice structure outside the first foot pressing pre-region is in gradual transition towards the topological structure or the lattice structure extending into the at least one first foot pressing pre-region, so that the stress intensity of the topological structure or the lattice structure in the at least one first foot pressing pre-region is smaller than that of the topological structure or the lattice structure outside the at least one first foot pressing pre-region.

In some embodiments, the gradual transition includes a gradual change of the lattice body structure, such as a gradual change of the size of a basic unit of the lattice structure, a gradual change of the density of the basic unit, a gradual change of the thickness of a wall surface of the lattice, a gradual change of the length of a rod diameter of the lattice, a gradual change of the thickness of a rod diameter of the lattice, a continuous gradual change of the geometrical structure (such as the geometrical structure type) of the basic unit of the lattice structure, and a gradual change of the performance of the lattice structure formed by a post-processing process or a printing process, such as a gradual change of the density of the lattice structure after molding, and a gradual change of the material of the lattice structure; or, the gradual transition is structural gradual change of the topological structure, for example, the gradual change of the rod diameter of the connecting rod body in the topological structure, the gradual change of the wall thickness of the topological structure, the gradual change of the volume formed by the gradual change of the connection mode between the rod diameters of the topological structure, or the gradual change of the material density of the topological structure formed by the manufacturing process and the post-processing process.

In one example, the at least one first foot preparation area is predefined, wherein, for example, the position and contour of the at least one first foot preparation area in the midsole are determined, an interface area is determined for topologic structures or lattice structures located outside the first foot preparation area extending towards the inside of the at least one first foot preparation area, the topologic structures in the interface area are provided as a gradual transition, or the lattice structure basic units are provided in the form of a transitional transition. In this case, the boundary region and the first foot-drying region may intersect or adjoin, i.e., the topological or lattice structure basic units in the gradual transition may extend into the first foot-drying region or to the determined boundary (or contour) of the first foot-drying region.

In some specific examples, the lattice structure in the interface region is designed in a form in which the basic unit size of the lattice structure is gradually changed; or, the basic unit geometric structure type of the lattice structure in the interface region is gradually changed, for example, the basic unit of the lattice structure outside the first foot pressing and drying region is a cone, and is gradually deformed along the extending direction, and the basic unit is formed into a spheroid in the at least one first foot pressing and drying region; for another example, the printing process is set such that the lattice structure in the boundary region extends from outside the first foot drying pre-region toward the first foot drying pre-region, and the corresponding lattice structure basic unit exhibits a form of gradual material density change.

In other specific examples, the topology structure in the interface region changes based on the connection mode, so that the stress intensity of the interface region gradually changes. It should be understood that the general topology does not have periodicity, and here, the connection form of the topology can be set arbitrarily, and in some implementations, the topology of the boundary region can be divided into different sub-regions, and the volume density of the topology in each sub-region is determined to represent the strength of the topology in the corresponding sub-region. In order to achieve a gradual transition of the topology located outside the first foot preparation area towards the topology extending inside the at least one first foot preparation area, the number of common connections at the connecting rod nodes in the sub-area of the topology or the average number of common connections at all nodes in the area may be reduced in accordance with the extending direction, or the rod diameter of the topology in the sub-area of the topology may be reduced in accordance with the extending direction.

In this case, the pressure exerted by the midsole in the worn state changes continuously between the different regions on the basis of a gradual transition of the topology or the lattice structure outside the first foot drying region towards the topology or the lattice structure extending inside the at least one first foot drying region, for example, at a defined position and contour of the at least one first foot drying region in the midsole, the plantar pressure inside and outside the contour changing continuously. For example, a pressure cloud is drawn based on the insole contour region, each unit region corresponds to an average pressure value, and the pressure change values in adjacent unit regions in the obtained pressure cloud are within a preset value, so that the sole pressure can be considered to be continuously changed. The foot pressure is adjusted to be in an overall continuous state based on gradual transition arrangement of the topological structure or the crystal lattice structure, such as gradual material density change, or gradual structural change, such as gradual rod diameter change of basic unit of the crystal lattice body or gradual rod diameter change of the topological structure in different areas. Under the continuously variable pressure state, the insole has better buffering capacity, and pressure transmission and sharing can be effectively realized among different areas; meanwhile, the uncomfortable touch feeling of overlarge local pressure intensity of the human body in a wearing state is relieved.

The predetermined values of the unit area and the pressure variation may be set manually, or may be determined based on medical intervention data of a target user, for example, a peak pressure value suitable for sole care may be determined, after a first foot-drying pre-region is determined, a topological structure or a lattice structure located outside the first foot-drying pre-region is gradually transited toward a topological structure or a lattice structure extending inside the at least one first foot-drying pre-region to reduce the peak pressure value outside the first foot-drying pre-region, or a threshold value of a sudden pressure variation of a pressure variation value in different regions of the midsole may be determined, where the threshold value may be set based on medical data or footwear performance, such as a sudden pressure variation easily causing a pricking pain on the sole when the foot pressure has a sudden variation, where the threshold value of the sudden pressure variation may be determined based on medical analysis to reduce or eliminate the discomfort feeling, such as a sudden variation of the pressure value experienced by different regions of the midsole may have a sudden variation, the buffer function may be impaired, where abrupt pressure changes in the interface area may be reduced to achieve a gradual transition; furthermore, the pressure change state suitable for the cushioning of the sole can be determined through the manufacturing process (standard) of the footwear, for example, to enhance the cushioning function of the midsole or the impact resistance, wear resistance and the like of the midsole.

The lattice structure is in the form of a unit structure constituting the midsole, and the shape and position relationship between the basic units of the lattice structure are similar to those of a lattice structure in chemical molecules on a macroscopic scale.

In some embodiments, the basic unit structure constituting the midsole is a shaped spatial tie bar, and the positional relationship between the tie bars may take the form of the positional relationship of bonds between the atoms of the unit cell units in the crystal. Of course, the basic unit form of the lattice structure of the midsole is not limited to the connection form of the actually existing unit cells, but is a structural form using connection bonds having a spatial orientation between the atoms of the unit cells. The insole composed of the lattice structure is a hollow structure. The lattice structure takes the form of a crystal connection common bond between chemical molecules, and the properties of the lattice structure are different corresponding to different connection forms. For example, when different connection modes are selected, the nodes corresponding to each basic unit of the crystal lattice may correspond to different valences, the valences can be used for indicating the degree of interconnection between the basic units of the crystal lattice structure, and the lower the valences, the fewer the connecting rods shared between the corresponding basic units.

In some embodiments, the lattice structure is configured to be composed of a planar hollow structure, the basic units of the lattice structure are hollow polyhedrons with a certain wall thickness, such as tetrahedrons, hexahedrons, and the like, and the basic units of the lattice structure are connected in a form of a common surface to form a preset midsole contour.

In some embodiments, for lattice structures using connecting rods to form basic units or lattice structures using planar bodies as basic units, each of the basic unit structures has the same or approximately the same geometrical structure, that is, the basic units in the lattice structures have a certain periodicity, and the lattice structures also have tensile, torsional or compressive deformation structures at different positions. The lattice structure can be divided into a plurality of basic units with similar connection forms on the basis of adopting connection keys or common planes with spatial orientations, and the whole structure is formed by stacking basic geometric units. The 3D structure of the insole composed of the lattice structure is subjected to certain deformation treatment on the basic unit structures at different positions, for example, the basic units at the outer contour of the insole conform to contour design, different deformation treatment such as stretching, twisting or compression and other deformation structures are presented at different positions, and the deformation treatment is the adjustment of the connection form of the basic unit structures under the state without external pressure so as to conform to the shape design of the insole. The deformation process for the base unit may be a stretching transformation or twisting process in the length, width, height, or two or more directions of the lattice base unit, based on the overall profile design and strength design decisions in different directions for the lattice structure of the midsole.

In certain embodiments, the geometric structure comprises a combination of one or more of a polyhedron, a face, a cone, a rhomboid, a star, and a spheroid. Wherein, for the lattice structure of the basic unit formed by the connecting rods, the solid structure of the insole corresponds to the edge of the basic geometric unit body; for a lattice structure with a hollow polyhedron as a basic unit, the solid structure of the insole corresponds to the wall surface of the basic geometric unit, wherein the wall surface comprises a plane, an arc surface or a curved surface. The insole can adopt a simple geometric structure as a basic unit of the lattice structure, can also adopt a combination of various geometric structures to form the basic unit of the lattice structure, and can also be arranged into different basic geometric unit structures in different position areas, for example, a rhombohedral structure is adopted at the waist part as the basic unit, and a polyhedron is adopted at the heel part or the sole part as the basic unit.

In some embodiments, the lattice structure may also be a lattice structure of a planar body, such as a minimal surface structure, the lattice structure of the minimal surface structure can provide shock absorption and buffering performance for sports shoes, a structure formed by filling and/or splicing and/or arraying a plurality of surfaces is spliced into a unit body, and the minimal surface structure formed by filling and/or splicing and/or arraying a plurality of unit bodies forms well staggered firm pillars, which can make the shoe midsole more supportive, and in one embodiment, the lattice structure of the minimal surface structure is, for example, the minimal surface structure described in patent publication No. CN 110652069A.

The topological structure is a hollowed-out connector formed by connecting different rod bodies based on a common node, wherein the entity of the insole topological structure is the rod body. The connection mode of the topology structure can be set based on human needs, for example, the end point of each rod in the topology structure and at least one rod common end point, each end point correspondingly has a common connection number, here, the common connection number can be preset to different values such as 2, 3, 4, 5, 6, etc., and the common connection number is the total number of rods connected at the node; furthermore, the connection direction of the rods in the topology structure may be set arbitrarily, and in some examples, the topology structure may be further optimized, so that the overall order of the topology structure is increased, for example, the number of common connections at each node in the topology structure is the same.

In some examples, the topological structure can be designed into a bionic structure such as a tree-shaped structure with branch extension as required, for example, the connection form of the rod diameter in the topological structure is set to be a form imitating the thickness of the rod diameter when the branches extend, and the number of the connection nodes is changed along the direction of the treetop; as another example, the form of rod diameter connections in the topology is arranged as microscopic cell morphology; for another example, the bar diameter connection form in the topology structure is set to be a vein-in-leaf form, in one example, the topology structure can be shown to be composed of a first basic unit (similar to a main vein and a side vein in the leaf) and a second basic unit (similar to a fine vein in the leaf), wherein the bar diameter thickness and the bar diameter length of the first basic unit are both larger than those of the second basic unit, the second basic unit is filled in the first basic unit to form the insole topology structure, the first basic unit can be used for ensuring the strength of the insole, and the filled second basic unit can be used for increasing the elastic deformation capacity of the insole; here, the specific form of the basic units in the first basic unit and the second basic unit can be set arbitrarily, that is, the form of the different basic units is not limited to periodicity.

In some examples, the topological structure may also be a planar body, where the planar body of the topological structure includes a plurality of pores therein, for example, a wall surface of a single planar body in the topological structure is a solid body, and the wall surface includes a plane, an arc surface, or a curved surface. Here, the form of the individual planar bodies in the topology includes a pyramid, a polyhedron, a spheroid, etc., and the form of each individual planar body in the topology of the midsole may be arbitrarily set, and in some examples, the topology may be optimized to increase the periodicity of the planar bodies.

Meanwhile, in the state of bearing external pressure, the topological structure or the lattice structure has rigidity or elastic deformation capacity of resisting stretching, torsion and shearing corresponding to different stress modes, namely has certain strength. For example, the topology or lattice structure within the first foot preparation region may have a strength less than the topology or lattice structure outside the first foot preparation region to effect a pressure distribution transfer from the first foot preparation region to other regions of the midsole when bearing weight. In a specific embodiment, the correspondence between the strength of the topological structure or the lattice structure and the endured pressure, shearing force, etc. can be obtained based on a strength performance test of the topological structure or the lattice structure, wherein the test can be a test of a topological structure entity or a lattice structure entity, or a simulation calculation is performed by combining the stress-strain relationship with the performance of the material itself, or the simulation calculation is compared with a design detection result to associate the strength of the crystal structure with the lattice structure or associate the form of the topological structure with the strength of the topological structure.

The strength of the topological structure and the lattice structure can be represented by strength performance indexes such as tensile strength, compressive strength, shear strength, bending rigidity, torsional rigidity and toughness, such as elastic deformation capacity, and the like, and in the insole, the strength of the lattice structure is mainly used for ensuring that the insole is in an elastic deformation state and the corresponding deformation amount is in a preset range in a wearing state (including a wearing state such as natural standing, walking movement, running movement and the like).

In certain embodiments, the force strength of the lattice structure is determined by at least one of the bulk density, the bulk structure, the printing material, the printing process, and the post-processing of each lattice structure; or, the stress intensity of the topological structure is determined by determining at least one of the volume density, the printing material, the printing process and the post-processing process of the topological structure.

In some examples, the bulk density of the lattice structure is related to the rod diameter thickness, lattice wall thickness, lattice size, density of the lattice rod body after molding; the volume density of the topological structure is related to the thickness of the rod diameter of the topological structure and the density of the molded topological structure rod body.

The solid structure of the lattice structure is in a form of a connecting rod or a wall surface, the volume density of the lattice structure is related to the length, the diameter, the connection density and the like of the connecting rod of the basic unit, and when the insole is filled with the material with uniform density, the volume density of the insole can represent the material usage amount in unit volume. Generally, when the connection form of the basic units of the lattice structure is determined, the stress strength of the lattice structure is positively correlated with the volume density of the lattice structure, and when the basic units of the lattice structure are smaller, namely the length of the connecting rods is smaller, the corresponding volume density is larger, so that the lattice structure of the insole has greater strength; or, when the diameter of the rod diameter of the connecting rod is larger, the corresponding volume density is larger, and the lattice structure of the insole has higher strength; for example, two lattice structures having different valences at the joint of the connecting rod and the node bar in the basic unit are generally different in volume density and structural strength from each other in accordance with lattice structure units having different connection methods.

In certain embodiments, for lattice structures connected in a common plane, the bulk density of the lattice structure is related to the thickness of the walls of the base unit, i.e., the wall thickness, the size of the base unit, and the geometry of the base unit. Generally, the wall thickness of the basic unit is positively correlated with the bulk density, for example, when the wall thickness of the basic unit is increased, the bulk density of the lattice structure is increased, and at the same time, the strength of the lattice structure is increased; as another example, when the basic cell wall thickness and geometry are determined, when the basic cell size is scaled down in equal proportion but the wall thickness is unchanged, a lattice structure with increased bulk density is obtained, while having greater strength. For the shoe midsoles with different basic units in different geometric structures, the shoe midsoles can also have different structural strengths, for example, the basic units are respectively two lattice structures of tetrahedrons and spheroids, and the shoe midsoles have different strength properties such as tensile strength, compressive strength, shearing strength and the like.

In some embodiments, the strength of the lattice structure in force is also related to the manner in which the connecting rods are attached, such as the direction in which the connecting rods are attached in the basic cell structure. For example, when the basic unit cell units are connected in two ways, i.e., a conical geometry unit and a regular hexahedron unit, the corresponding lattice structures have different strengths. Because the lattice structure of the insole adopts the connection form of the rod pieces, when the directions of the rod pieces are different, the transmission directions of the forces between the corresponding rod pieces are different under the compression state, and the deformation resistance of the lattice structure is also different.

In some embodiments, the lattice structure is selected to be a different cell structure or basic cell geometry and bulk density in different regions of the midsole, but the variation in the bulk density of the midsole lattice structure is continuously variable in the midsole region to achieve a sufficient cushioning force of the midsole for the foot.

In an example, the volume density distribution of the topological structure is determined by setting the rod diameter thickness of the topological structure in each unit area, so as to realize that different areas of the insole topological structure bear pressure according to a preset pressure distribution rule, for example, when the material density of the rods in the topological structure is uniform, the rod diameter of the rods in the topological structure in each unit area is increased, so that the volume of the rods in each unit area is increased, and the volume density of the corresponding topological structure in each unit area is increased.

When the midsole is manufactured by a 3D printing process, the strength performance of the molded midsole is usually related to the printing material, and here, entities with different structural strengths may be formed based on the setting of the printing material, and in some examples, the stress strength of the lattice structure or the topological structure is determined based on the predetermined printing material.

In certain embodiments, the force strength of the topology or lattice structure is related to the material density of the tie bars or walls. Here, the material density may be determined based on a printing material or a printing process. For example, when the topological structure or the lattice structure is manufactured by a sintering method of 3D printing, in the process of sintering and curing, when the energy density of radiation is different, the density of the cured part corresponding to the sintered part is different. For example, as the laser energy density generally increases for ceramic powder, the strength of a sintered part tends to increase first and then decrease, that is, different materials have energy values for obtaining the optimal density during sintering; setting the energy density of radiation as the optimal density-corresponding energy value according to the selected material characteristics in specific printing, so that the sintered lattice structure has higher strength; for another example, when the powder particle size of the sintering material is different, the sintering performance may be different, and for a specific material, when a suitable powder state such as powder size and powder geometry is set, and sintering is performed to obtain a sintered part with a dense microstructure, the material density of the connecting rod is higher, and the connecting rod has greater strength.

In some embodiments, the stress intensity of the topological structure or the lattice structure is further related to a post-processing process of printing, for example, after the midsole is obtained by 3D printing, a structure strengthening treatment or a chemical treatment is performed on the topological structure or the lattice basic unit in a certain area, for example, outside the first foot pressure dry pre-processing area, so as to strengthen the corresponding topological structure intensity or lattice structure intensity of the area.

In certain embodiments, the gradual transition of the lattice structure outside of the first foot drying region towards the lattice structure extending within the at least one first foot drying region is achieved by determining at least one of a bulk density of the lattice structure, a lattice bulk structure, a printing material, a printing process, and a post-treatment process; or, the gradual transition of the topology outside the first foot preparation area towards the topology extending inside the at least one first foot preparation area is achieved by determining at least one of a bulk density of the topology, a printing material, a printing process, and a post-treatment process.

In one embodiment, please refer to fig. 2a and 2b, wherein fig. 2a is a schematic diagram of a lattice structure of a partial region of a midsole of the present application in one embodiment, and fig. 2b is a side view of the lattice structure of the partial region of the midsole. As shown in fig. 2a and 2b, after at least one first foot preparation region of the midsole is determined, the rod diameters of the lattice structure basic units extending toward the first foot preparation region from the lattice structure outside the first foot preparation region are gradually reduced (in the X direction following the arrow in fig. 2a and 2 b), and the volume density of the lattice structure is correspondingly gradually reduced from the outside of the first foot preparation region to the inside of the first foot preparation region, so that the strength of the lattice structure outside the first foot preparation region is gradually reduced toward the strength of the lattice structure extending toward the first foot preparation region. In this case, the rod diameters of the basic units of the lattice structure extending from the lattice structure located outside the first foot drying pre-region to the first foot drying pre-region are gradually reduced, so that the lattice structure as a whole has no shape change.

Referring to fig. 2c and fig. 2d, a schematic perspective view and a schematic plan view of a lattice structure with a basic unit adopting another geometric structure are respectively shown, as shown in the figure, the basic unit in the midsole is a hole-like hexagonal body, a lattice structure entity corresponds to a connecting rod as a side length of a hexagon, and the volume density of the lattice structure extending from the lattice structure outside the first foot drying pre-region to the first foot drying pre-region is gradually reduced; in one implementation, such as the illustrated embodiment, the rod diameters of the lattice structure base units are tapered in a direction extending toward the first foot press dry region (in the X direction following the arrows in fig. 2c, 2 d). The lattice structure outside the first foot pressing and drying pre-region is in gradual transition towards the lattice structure extending into the at least one first foot pressing and drying pre-region, and the gradual transition can also be realized by setting the size of the basic unit, for example, the length of the rod diameter of the lattice structure outside the first foot pressing and drying pre-region towards the lattice structure basic unit of the first foot pressing and drying pre-region is gradually increased, the volume density of the corresponding lattice structure basic unit is gradually reduced, and the stress intensity is gradually reduced.

In other implementations, when the lattice structure basic units are in the form of planar bodies, the gradual transition may be implemented by changing the wall thickness of the lattice structure basic units, which includes, but is not limited to, setting the wall thickness of the lattice structure basic units extending from the lattice structure outside the first foot pressing pre-region to gradually decrease along the extending direction, for example, to continuously decrease linearly.

Here, the gradual transition of the lattice structure located outside the first foot drying pre-region and extending toward the first foot drying pre-region may be determined based on the specific type of the adopted lattice structure, for example, when the lattice structure is a planar body in which pores exist between different basic units, the gradual transition of the lattice structure may also be achieved by gradually increasing the size of the pores and gradually decreasing the volume density of the corresponding basic units of the lattice structure in a direction toward the first foot drying pre-region. The lattice structure alternatives and the manner in which the graded transition is achieved are not limiting of the illustrated embodiments.

In another embodiment, the gradual transition may also be achieved by gradual transition of the lattice structure, such as gradual change of the size of the basic unit of the lattice structure, gradual change of the density of the basic unit, gradual change of the thickness of the wall surface of the lattice, gradual change of the length of the rod diameter of the lattice, gradual change of the thickness of the rod diameter of the lattice, continuous gradual change of the geometric structure (such as the type of geometric structure) of the basic unit of the lattice structure, and the like.

Referring to fig. 2e, a schematic view of a portion of the midsole topology according to an embodiment is shown. The topology shown in fig. 2e has a first foot dry-out region, wherein the rod diameter of the rod in the first foot dry-out region is smaller than the rod diameter of the rod outside the first foot dry-out region, and the rod diameter changes to a gradual deformation form; as shown, the rod diameters in the topology decrease in a direction toward the first foot preparation area such that the volumetric density of the topology extending from the topology outside the first foot preparation area toward the first foot preparation area decreases.

In some embodiments, the gradual transition may also be achieved by a change in the printing material, for example, by using printing materials with different hardness, so that the printed topological structures or lattice structures of the printing materials with different hardness have different strengths, thereby achieving a gradual transition of the topological structures or lattice structures located outside the first foot drying pre-region and extending toward the first foot drying pre-region by the gradual change in the hardness of the printing materials.

In a further embodiment, the gradual transition may also be achieved by a printing process, for example, the midsole is manufactured by a 3D printing process, and the topology or the lattice structure outside the first foot drying region is gradually changed toward the topology or the lattice structure extending into the at least one first foot drying region in response to the received radiation energy density during the radiation forming process, for example, the energy density is gradually reduced in accordance with the extending direction, so that the strength of the solidified topology or the lattice structure is gradually reduced.

In yet another embodiment, the gradual transition may also be achieved by a post-treatment process, such as removing a portion of the rods of the lattice structure to change the strength of the lattice structure, or removing a portion of the rods of the lattice structure to reduce the number of node connections to change the strength of the lattice structure; for another example, in the midsole manufactured based on the 3D printing process, in the post-curing step of the printed midsole through 3D printing, the topology structure or the lattice structure outside the first foot drying region and extending toward the inside of the at least one first foot drying region is irradiated by light sources with different intensities, and the like.

In an embodiment of the present application, the topology or the lattice structure outside the first foot drying pre-region is in gradual transition towards the topology or the lattice structure extending into the at least one first foot drying pre-region, that is, the topology or the lattice structure strength corresponding to the boundary region or the gradual transition of the corresponding pressure distribution, based on the method for determining the stress strength of the midsole topology or the lattice structure provided by the present application, by setting at least one influencing factor of the stress strength in the manufacturing (including the post-processing) of the midsole, the topology or the lattice structure outside the first foot drying pre-region can be in gradual transition towards the topology or the lattice structure extending into the at least one first foot drying pre-region, thereby increasing the comfort level of a user in use.

Referring to fig. 3a, a schematic view of the structure of the midsole of the present application in one embodiment is shown, as shown in fig. 3a, the lattice structure of the midsole adopts different connection forms or different volume densities in different regions. In the forefoot and heel regions of the midsole, first foot drying zones are provided, which correspond to the areas of the embodiment shown in fig. 3a in which the lattice density is reduced, such as first foot drying zone 111 of ball 11 and first foot drying zone 131 of heel 13 of first foot drying zone 112, and the corresponding lattice structures have a reduced bulk density. Designing based on weakening of the lattice structure strength of the first foot pressing pre-region; in some examples, the midsole may also adopt a topology structure, and a plurality of first foot drying regions are disposed therein, and the strength of the topology structure corresponding to the first foot drying regions is weakened in the design or manufacture of the midsole by determining table variables such as printing process, volume density, and the like, which determine the strength of the topology structure, wherein the pressure applied to the midsole in a treaded state is naturally dispersed to a region corresponding to a greater structural strength other than the first foot drying regions to achieve the balance of the supporting force and the pressure to the human body.

In certain embodiments, the strength of the lattice structure of the first foot preparation region is correlated to calculated expected foot pressure data, wherein the expected foot pressure data is less than measured foot pressure data corresponding to the at least one first foot preparation region.

Please refer to fig. 3b, which is a schematic structural view of a midsole of the present application in one embodiment. In some embodiments, at least one second foot drying pre-region is provided in the midsole, wherein the midsole may adopt a lattice structure (as shown in fig. 3 b) or a topological structure (not shown), and at least one second foot drying pre-region is provided in the midsole, such as second foot drying pre-region 113 shown in fig. 3b, and the second foot drying pre-region 113 is located in a heel portion, a sole portion, or a fossa portion of the midsole; the topological structure or the lattice structure outside the second foot pressing pre-region is in gradual transition towards the topological structure or the lattice structure extending into the at least one second foot pressing pre-region, so that the stress intensity of the topological structure or the lattice structure in the at least one second foot pressing pre-region 113 is greater than the stress intensity of the topological structure or the lattice structure outside the at least one second foot pressing pre-region 113.

Here, the force intensity is determined by at least one of a bulk density of each lattice structure, a lattice bulk structure, a printing material, a printing process, and a post-processing process; alternatively, the structural strength of the various regions of the midsole topology may be determined by at least one of the bulk density of the topology, the printing material, the printing process, and the post-treatment process.

The stress intensity of the topological structure or the lattice structure corresponding to the second foot pressing pre-region is greater than the volume density of the topological structure or the lattice structure outside the second foot pressing pre-region, so that a solid structure with higher intensity is obtained correspondingly. In some embodiments, the midsole first foot drying region is designed with weakened strength, and the second foot drying region with increased structural strength is arranged to balance the pressure distribution in order to realize the adjustment of the pressure distribution on the sole of the foot.

Here, the topological structure or the lattice structure located outside the second foot drying region is in transition gradual change towards the topological structure or the lattice structure located inside the at least one second foot drying region, and in some examples, the transition gradual change is achieved by setting at least one of determinants of stress strength of the topological structure or the lattice structure, such as volume density of the lattice structure, crystal lattice body structure, topological structure volume density, printing material, printing process and post-processing process.

Please refer to fig. 4a and 4b, which are schematic views illustrating a lattice structure of a midsole of the present application according to an embodiment of the present application. As shown in the figure, the basic units of the lattice structure adopt a rod diameter connection form, wherein the basic units gradually increase or become thicker along the X direction conforming to the arrow direction, wherein the X direction corresponds to the direction extending from the outer part of the second foot pressing and drying pre-region of the insole to the second foot pressing and drying pre-region, and based on the arrangement of the basic units of the lattice structure, the stress intensity of the lattice structure positioned outside the second foot pressing and drying pre-region towards the lattice structure positioned in the at least one second foot pressing and drying pre-region gradually increases, and the borne sole pressure gradually increases.

Referring to fig. 4c, a schematic structural view of a partial region of the topology structure of the midsole in an embodiment is shown, as shown in the drawing, the rod diameter of the connecting rod in the topology structure gradually increases along the direction X, where the direction X corresponds to a direction extending from the outside of the second foot pressing and drying region of the midsole to the second foot pressing and drying region, and based on this arrangement, the stress intensity of the topology structure located outside the second foot pressing and drying region toward the topology structure within the at least one second foot pressing and drying region gradually increases, and the corresponding sole pressure borne by the topology structure gradually increases.

In some examples, the topology may be configured such that the number of node connections per unit area gradually increases (not shown) in a direction extending from the outside of the second foot pressure preparation area to the second foot pressure preparation area, so as to form a gradual increase in volume density toward the second foot pressure preparation area, and the force intensity applied to the topology gradually increases.

Here, it should be understood that the influence factors of the stress intensity of the topological structure or the lattice structure of the second foot drying pre-region corresponding to the first foot drying pre-region are similar, and the arrangement of the basic units of the lattice structure in different regions or the design of the topological structure in different regions are that the expected distribution state of the pressure distribution of the middle sole when the shoe is worn is realized. The topological structure or the lattice structure outside the second foot pressing pre-region is made to gradually transition towards the topological structure or the lattice structure inside the at least one second foot pressing pre-region, and the method can also be realized through a printing process, a post-treatment process, a printing material and the like, and compared with the method that the topological structure or the lattice structure outside the first foot pressing pre-region is made to gradually transition towards the topological structure or the lattice structure inside the at least one first foot pressing pre-region, the specific implementation mode is similar, and the description is omitted; accordingly, the adjustment of the basic cell or topology of the lattice body in accordance with the extension direction is usually opposite, since the transition is gradually reduced and gradually increased, respectively, from the extension of the first foot stem region to the first foot stem region and from the extension of the second foot stem region to the second foot stem region. In particular, the first and second foot drying zones may each determine a zone distributed in the midsole based on desired foot pressure data for a target user.

In certain embodiments, the intensity of the topology or lattice structure of the second foot pressure intervention region is correlated to calculated expected foot pressure data, wherein the expected foot pressure data is greater than measured foot pressure data corresponding to the at least one second foot pressure intervention region.

The expected foot pressure data is the expected human body foot pressure data corresponding to the insole of the application in a worn state, namely the foot pressure data adjusted by the insole.

In the actual manufacturing of the midsole, the overall structure of the midsole is designed based on the physical factors of the target user, such as foot shape profile data, gait data, body shape data, weight data, actually measured foot pressure data, medical intervention data, and the like, and it can be considered that the pressure of the overall area of the midsole is determined by the expected foot pressure data.

In some embodiments, the area requiring sole pressure reduction, i.e., the first foot pressure pre-drying region, is determined from the desired foot pressure data and the measured foot pressure data based on the sole protection requirement of the target user, and the intensity of the topological structure or the lattice structure is adjusted to determine to disperse the remaining pressure outside the first foot pressure pre-drying region based on the range of the first foot pressure pre-drying region and the pressure range corresponding to the region.

In some embodiments, the desired foot pressure data is used to determine a foot pressure adjustment manner for the target user, and based on the requirement of pressure distribution, a region available for pressure bearing, i.e., the second foot drying pre-region is determined, and the design strength of the topological structure or the lattice structure corresponding to the second foot drying pre-region is increased, so that the pressure borne by the second foot drying pre-region in the wearing state of the midsole is increased, and the sole pressure outside the second foot drying pre-region is naturally reduced.

Particularly, for the same target user, after a first foot drying pre-region is determined, the design is carried out, and the sole pressure born by the part outside the first foot drying pre-region is naturally increased; or, after the second foot drying pre-region is determined, the design is carried out, and the sole pressure born by the part outside the second foot drying pre-region is naturally reduced. That is, the effect of pressure adjustment can be achieved by determining the first foot drying pre-region or the second foot drying pre-region for design. Of course, the first foot drying area and the second foot drying area may be determined simultaneously based on the expected foot pressure data and the measured foot pressure data to define the area for bearing the dispersed pressure while determining the area to be subjected to pressure dispersion, as in the embodiment shown in fig. 3 b.

The foot pressure data are pressure distribution data of different areas of the insole of the shoe product in a worn state, and the pressure distribution data comprise static pressure distribution and dynamic pressure distribution of a target user in the motion process and are used for indicating the distribution condition of stress on the insole. The pressure distribution of the foot pressure data is a pressure vector with directions, for example, a common three-dimensional rectangular coordinate system is adopted, and the pressure values of the insole can be respectively decomposed in different directions. The region range of the foot pressure data distribution is a three-dimensional space region of the insole, namely the foot pressure data comprises the space position and the pressure vector of the pressure distribution. Based on the relative force, the foot pressure data can represent the stress condition of the foot and the shoe contact surface of the target user in wearing.

In some embodiments, the foot pressure data may be acquired from a pressure plate or pressure detector. For example, by indicating the standing state of the target user, the target user is enabled to contact the pressure plate with the sole in the barefoot state, and a corresponding sole pressure map is received from the pressure plate, and the pressure map can be used for representing the pressure distribution data of the sole. In particular, in one embodiment, the pressure plate is provided with a pressure sensor thereon and the pressure plate is connected to a digital pressure analysis system. The pressure sensor can identify the touch area and touch time of a human body, namely, the pressure in a preset time length can be collected, and the corresponding pressure distribution map of the sole can be displayed through the digital pressure analysis system which transmits the sensor signal. The pressure distribution diagram profile is displayed as the profile of the contact surface of the sole and the pressure plate, and the pressure values of different areas of the pressure distribution diagram correspond to the foot pressure values corresponding to the areas in the pressure acquisition. The pressure distribution graph can be represented in different forms, for example, according to the collected data, the pressure distribution graph can be displayed as a contact surface composed of different unit blocks, and the value in each unit block represents the average pressure of the unit area; meanwhile, the values in the pressure distribution graph can be displayed as different values based on manual selection or automatic selection of units by a pressure analysis system, for example, if the values are displayed in units with different orders of magnitude, the pressure distribution graph with different displayed values can be obtained, or according to a set pressure level, the pressure distribution graph can be used as a display unit: e.g., every 10Pa, is shown as a value of 1, and optionally, the pressure value per unit area is rounded using a comparison rule, e.g., rounding.

In certain embodiments, the foot pressure data is obtained by statistics. For example, for a certain number of target user groups, determining a pressure distribution rule of a human body in a natural state based on big data analysis, such as a relatively low pressure region corresponding to an arch of the foot, and obtaining a relation between parameters such as weight and Body Mass Index (BMI) and a pressure value, so that the corresponding group types can be divided according to characteristics of the target users, such as weight characteristics, for example, for the target user groups divided into the order of weight of 60-70 kg, and determining conventional sole pressure distribution based on the group types; for another example, the big data analysis includes medical data statistical analysis, and for a certain class or certain classes of disease conditions, such as diabetes, poliomyelitis, and other diseased groups which are easy to cause foot diseases, common plantar pressure distribution states of the patients are determined based on the medical statistical analysis, so that the corresponding group classes are determined based on characteristics of target users, such as disease states, such as diabetes patients, and foot pressure data of the target user groups are obtained.

The actually measured foot pressure data is the human body sole pressure measured in a state without external adjustment, such as the human body sole pressure of a bare foot standing naturally. In one implementation, the measured foot pressure data (which is the unadjusted foot pressure data) in the same human body posture may be determined to set the corresponding expected foot pressure data, such as the foot pressure data of the target user on the plane in the natural standing state without leaning, the expected foot pressure data in the natural standing state is set based on the foot pressure data, and the expected foot pressure data value of the first foot drying prediction area is set to be smaller than the measured value of the corresponding foot area. In an application scenario, the first foot pressure pre-drying area may be an area where the foot is pressed greatly in a natural standing state, and is adapted to the requirements of comfort and foot protection, and the expected foot pressure data value in the area is obtained by performing pressure dispersion adjustment on the corresponding area in the measured data, so that the expected foot pressure data in the foot pressure pre-drying area is reduced.

Please refer to fig. 5 and fig. 6, which are respectively a simulation diagram of a sole pressure distribution according to an embodiment, wherein fig. 5 is a simulation diagram of a human body test pressure distribution based on measurement, and fig. 6 is a simulation diagram of a sole pressure distribution corresponding to an adjusted expected foot pressure data. The numerical value in each cell is expressed as the average pressure in the area, the corresponding sole pressure distribution state can be obtained through the numerical values displayed in different areas of the sole, the numerical value is determined by the actual foot pressure value or the expected foot pressure value and the selected pressure unit, and for the same foot pressure distribution simulation diagram, the larger the numerical value is, the larger the average pressure in the corresponding unit area is. In the pressure distribution diagram, the size of each cell may be set based on selection, and is not limited by the actually measured foot pressure data density, for example, in the simulation diagram of the actually measured sole pressure distribution shown in fig. 5, the numerical value displayed in each cell may be a pressure value measured by 1 pressure sensor, or an average value of the measured values of 4 pressure sensors arranged in a square, and the range of each display cell may be set artificially based on the rule of displaying the foot pressure distribution; meanwhile, the numerical values in the foot pressure distribution diagram are different based on the selection of the foot pressure units, and the same foot pressure data can be displayed as different numerical values based on different pressure unit settings.

Based on the foot pressure data of the target user in the natural state in fig. 5, the relative high pressure region and the low pressure region in the range of the sole of the foot of the target user are determined. As shown in fig. 5, in the non-adjusted state, the arch region of the human body corresponds to a smaller pressure value, such as the region where the pressure value is shown as 0 in the embodiment shown in fig. 5, in some practical scenarios, the arch region is not in contact with the pressure plate, i.e. the pressure in the region is 0, and the relatively high pressure region is usually located at the ball part and the heel part (e.g. the region where the

numbers

70 or 76 are distributed in the embodiment shown in fig. 5). For a desired foot pressure profile such as that shown in fig. 6, it can be seen that the same regions of the sole of a foot correspond to different pressure values before and after adjustment, and that the pressure in the partial region in the region of the relatively high pressure can be selectively distributed to the low pressure region, thereby changing the pressure distribution of the sole of the foot in the natural state.

As shown in fig. 5, in a natural state without external action, the arch region of the human body generally has little or no pressure on the sole, and in some embodiments, based on the pressure adjustment on the heel region or the half-sole region of the foot, it is necessary to transfer the pressure of the region partially to the arch region to achieve the pressure dispersing effect, i.e., to assume the pressure distribution state shown in fig. 6; or, based on the determined area corresponding to the foot pressure peak value, the pressure is adjusted to the half sole area, the heel area and the arch area outside the pressure peak value in order to reduce the pressure peak value.

In certain embodiments, the desired foot pressure data is calculated based on measured foot pressure data of the target user obtained by measurement and corresponding medical intervention data. Desired foot pressure data is determined from the target user's measured foot pressure data in combination with the medical intervention data to ensure that the midsole structure is adjusting the user's foot pressure distribution at a desired target and with a desired strength and reliability. And the actual measurement foot pressure data determines the foot pressure distribution state of the target user, and the medical intervention data determines the required pressure distribution adjustment.

The medical intervention data is foot pressure distribution data for a desired or expected correction for the physical state of the target user. Obtained by physiological measures such as tendon reflex and pathological reflex, muscle strength and muscle tension, joint mobility, sensation (tactile/pain/proprioceptive), tenderness, swelling, skin condition (ulcer/color), and the like. The determination of the medical intervention data is related to a plurality of physiological health indexes and is used for relieving the symptoms of specific target users or reducing the risks of diseases of the target users, or the pressure state beneficial to foot maintenance is determined to be converted into preset medical intervention data based on medical data analysis. In one implementation, the region and value of the medical intervention data are determined according to the foot form data and the treatment plan measured by the foot form scanner, for example, for a target user with an ulcer area on the sole, the corresponding ulcer area has an expected pressure value range based on the requirements of foot protection and disease rehabilitation, the topological structure or lattice structure of the insole is designed according to the measured foot pressure data and the medical intervention data, and the expected pressure distribution and the wearing touch feeling of the target user are realized; if the target user with abnormal local pressure on the foot is in a state of treating uneven sole stress, the corresponding medical intervention data of the abnormal local pressure area is pressure distribution data corresponding to the uneven sole stress reduction or elimination, the actually measured foot pressure data and the medical intervention data are referred to, the pressure transfer area and the transfer value of the foot pressure drying pre-area are determined, and the corresponding expected foot pressure data are obtained through calculation.

In certain embodiments, the desired foot pressure data is obtained from the measured foot pressure data and a medical stage at which the target user is located as characterized by the medical intervention data. Specifically, the medical intervention data includes a stage of the target user on a disease, which is obtained by analyzing physiological detection data of the target user.

In one embodiment, the foot pressure distribution state required by the target user at the stage is determined according to medical statistical analysis for the target user who does not show obvious pathological characteristics of the foot, such as no wound on the foot, no obvious foot deformation and no risk of suffering from the foot sole from medical data, namely, for the foot sole maintenance or the foot sole correction of the target user in a preventive state or with no obvious pathological changes. For example, if the peak foot pressure value of the target user is higher but no obvious foot abnormality or disease exists, the peak foot pressure value of the relative high pressure area of the sole of the target user is reduced to the normal peak foot pressure value, so that the occurrence of sole lesion can be avoided, the medical intervention data determined from the above is the pressure value range of the relative high pressure area in the actually measured sole pressure after medical adjustment, which can prevent or reduce the foot deterioration caused by the sole pressure, and the adjusted sole expected pressure data is determined by combining the actually measured foot pressure distribution of the target user; for another example, for a user who has diabetes, poliomyelitis or the like and is likely to cause foot diseases but does not have obvious foot diseases, the subsequent regions where the soles of the feet are likely to be damaged by diseases can be determined based on medical analysis of the stage of the target user on the symptoms, and the pressure value ranges corresponding to the regions required for preventing or reducing the diseases can be determined, so that the determined medical intervention data is linked with the measured foot pressure data to set the expected foot pressure data of the target user.

In one embodiment, for a target user who has plantar ulceration, calluses, foot bone deformity and the like and can clinically detect obvious plantar lesions, a pressure distribution state suitable for treating plantar ulceration or inhibiting plantar degeneration can be determined based on disease severity evaluation of the plantar ulceration, for example, for an area where plantar ulceration exists, pressure values in the area need to be relieved as much as possible to inhibit pathological degeneration, and the area needing foot pressure adjustment and the adjusted pressure value can be determined by contrasting foot pressure data of the target user in a non-adjustment state, namely expected foot pressure data suitable for the disease stage.

The desired foot pressure data may be set using units of pressure of the pressure profile to determine an amount of units of adjustment, the unit amount is a basic unit of adjustment for increasing or decreasing the pressure distribution value over the actual distribution state, if the value 1 of the pressure unit adopted by the pressure distribution diagram, namely the unit pressure size of 1 times, is taken as the basic unit of adjustment, based on the actually measured value on the pressure distribution diagram, for the pressure intervention area needing to reduce the pressure, the expected pressure value is an integer multiple of 1 less than the measured pressure value, for example, for a target user in the pre-foot or prevention stage, a cell region having a plantar pressure peak value of 70 at selected pressure units, the pressure peak value being determined to need to fall below 50 based on medical intervention data thereof, and the adjusted desired foot pressure value being set to a natural number of 50 or 49 or less; if the expected foot pressure value of the sole trauma region of the target user with sole wounds is 25 or less, the adjusted region pressure value is adjusted to be a natural number of 25 or less.

In some embodiments, the force strength of the lattice structure in the at least one first foot preparation region or/and second foot preparation region is correlated with the calculated desired foot pressure data and the measured foot profile data.

The foot shape contour is a three-dimensional contour of a target user foot, and different contour forms correspond to different distribution of pressure on a sole, namely the stress point and the stress magnitude of the foot are different. The acquisition mode of the foot-shaped profile data of the target user comprises the following steps of obtaining by scanning of a 3D foot scanner or obtaining by processing based on a visible light image and a depth image shot by a binocular camera, wherein the parameters of the foot-shaped profile data comprise: foot length, foot width, toe height, arch width, arch circumference, medial malleolus height, lateral malleolus height, heel width, heel height, and the like.

In some embodiments, the target user's foot contour data is obtained from big data statistical analysis, such as collecting human foot contours from big data to determine common foot contour forms and partially specific foot contour forms, such as foot contour corresponding to the body of an ailment of the foot, different foot contour corresponding to the congenital foot deformity classification. The statistical analysis of the big data may also correlate the foot shape profile data of the target user with physical characteristics, such as foot shape profile data corresponding to different genders and foot lengths. Thus, corresponding foot type contour data is determined according to the classification of the target user group.

The target user's foot contour determines an area of pressure distribution that is adjusted to conform to the target user's foot contour when pressure distribution adjustment is achieved from the desired foot pressure data to determine that the pressure distribution is consistent with an expected effect on the corresponding target user's foot. For example, it is desirable that the foot pressure data be distributed to relieve the target user metatarsal and heel pressure values, spreading the pressure to the arch; considering the foot profile, it is necessary to determine the pressure value in a numerical range that does not cause damage to the arch while dispersing the pressure to the arch, determine the range of foot pressure adjustment and the limitation of the adjustment value based on the foot profile of the target user, and design the lattice structure strength to achieve the intended adjustment function in combination with the desired foot pressure data.

In some embodiments, the force strength of the lattice structure in the at least one first foot preparation region or/and second foot preparation region is correlated to the calculated expected foot pressure data, the measured foot contour data, and the gait data.

The gait data comprises the whole body posture and gait of the target user in the walking process, including walking rhythm, stability, fluency, symmetry, gravity center shift, arm swing, postures and angles of joints, the expression and the expression of the target user, the action of auxiliary devices (orthotics, walking aids) and the like.

The gait data rules affect the pressure distribution of the midsole in a long-term wearing state. The natural standing state and the walking state generally correspond to different foot pressure distributions, and moreover, the pressure distribution change caused by walking is related to the walking habit of the target user, so that the walking habit has individual specificity. The distribution of pressure during walking of the target user, reflected by the gait data, and the expected foot pressure data and foot shape profile data set for the target user determine the topological structure or lattice structure strength of different areas of the insole during manufacture. Or, based on the walking habits of different target users, the gait data can reflect the situation that the left foot and the right foot may have asymmetric pressure, and based on the situation, different strength designs are adopted for the topological structures or lattice strengths of the two midsoles corresponding to one pair of shoes.

Meanwhile, the gait data is related to the physical functions of the target user, for example, elderly people generally have lower walking speeds and smaller strides, and the time for the sole to stand while being supported by both feet in walking becomes longer. The strength of the topological structure or the lattice structure is related to the human body touch feeling in wearing, and comprises rigidity or hardness, and the topological structure strength or the lattice structure strength can be set to have higher toughness and lower hardness for a target user with longer support period of the double feet in gait data analysis.

In certain embodiments, medical intervention data is determined based on an analysis of the gait data. And comparing clinical examination data of medical measurement with experimental analysis of gait data, comprehensively evaluating the symptoms of the target user, and determining medical intervention data set for the target user based on quantitative and standardized inference. The expected foot pressure data, the gait data and the foot shape outline data provide conditions and limits for the pressure distribution mode, and the optimal mode is obtained by combining different pressure distribution schemes in a contrast mode so as to design the lattice strength.

Referring to FIG. 7, a side view of the midsole of the application in one embodiment is shown. The dimple portion 12 corresponds to the arch of the target user, and the preset height of the dimple bulged portion 121 matches the arch height of the target user.

In some embodiments, the raised portion 121 of the waist socket portion has a predetermined height to support the arch of the target user. In a natural standing state or a walking state, the pressure applied to the sole of a human body is mainly distributed on the sole part and the heel part. During the process of foot pressure distribution, pressure is transferred to a non-foot-pressure-dry area, such as the arch area. By setting the preset height and strength of the bulge of the fossa portion, a contact surface for bearing dispersed pressure is provided for the arch portion.

In one embodiment, the height of the dimple ridge 121 is determined based on the foot profile of the target user, such that the dimple profile curve substantially conforms to the target user's arch profile curve according to the arch form of the target user. Specifically, the force strength of the raised portion 121 of the waist socket portion is correlated with the desired foot pressure data and the foot shape profile data of the target user. The expected foot pressure data may be calculated based on measured foot pressure data of the measurement target user and corresponding medical intervention data. According to the preferred mode of adjusting the distribution of plantar pressure to the target user, a desired distribution map of plantar pressure is designed and combined with the foot shape profile of the target user so that the adjusted plantar pressure is distributed in a desired manner. The contour design and the strength design of the lattice structure of the waist socket part are used for realizing the adopted pressure distribution scheme, so that the waist socket part can bear the pressure with the expected effect and has reliable strength when the shoe insole is worn. Based on the analysis of the relation between the strength of the topological structure or the lattice structure and the stress, the expected strength of the topological structure or the lattice structure is calculated and obtained on the basis of the known pressure distribution.

In some embodiments, the height of the raised portion 121 of the waist socket portion and the force intensity thereof are related to the calculated foot pressure data and foot shape profile data and gait data of the target user. And determining the strength design of the topological structure or the lattice structure of the fossa glenoid part by the actually born pressure of the arch part by combining the expected pressure data obtained by calculation and the foot shape contour according to the walking habit preference and the physical state of the target user represented by the gait data.

In some embodiments, the contour curve of the waist socket portion and the arch contour curve of the foot show an incomplete fit state based on the sole state of the foot of the target user, for example, when there is an injury such as a laceration of the fascia on the sole in the arch region of the target user, when the pressure peak in the high pressure region of the sole is reduced by increasing the sole contact surface, the contour design of the waist socket portion is adjusted to the incomplete fit state based on the arch contour curve of the target user, so that the pressure in the arch region close to the injury position of the fascia is reduced.

Generally, the function of the midsole in footwear is to absorb shock and cushion, such as absorbing shock and shape rebound during movement, and the thickness of the midsole is related to the shock absorbing function and also determines the feel of the intended user in wearing, such as hardness. The midsole exhibits a non-uniform thickness for accommodating the needs for pressure matching of the target user's foot, while the thickness value is determined with reference to the target user's physical state. As shown in figure 7, the midsole exhibits a non-uniform thickness, with a curvature at the upper surface that conforms to the contour of the bottom surface of a human foot, such as a corresponding ridge at the glenoid portion 12 at the mid-sole that corresponds to the human arch.

The number of the basic unit layers of the lattice structure of the midsole can be determined based on a preset three-dimensional contour and a basic unit geometric structure of the midsole, for example, the number of the midsole layers can be 0.5 layer, 1 layer, 5 layers and the like, and the application is not limited. In some embodiments, the base unit of the midsole lattice structure is a different number of layers in different regions, e.g., 1 layer in a first foot press preparation region and 3 layers in a second foot press preparation region.

In different regions of the midsole, there is a certain deformation process of the basic cell structure of the lattice structure, such as a reduction in the thickness of the midsole at the forefoot region, and the basic cells of the lattice structure in this region are reduced to increase the volume density for ensuring the structural strength of the weak region in the midsole.

In some embodiments, the predetermined thickness of the midsole is correlated to at least one of measured body data, weight data, foot shape profile data, gait data, or foot pressure data of the target user. Specifically, the thickness of the midsole affects the overall elastic deformation tendency and the sole pressure distribution of the target user when the insole is worn, and the preset thickness can change the stress state of the target user, so that various mechanical parameters of the preset thickness and the stress of the target user are related to the touch of the corresponding target user.

For example, when the weight data value of the target user is large, the corresponding midsole bears a large pressure, and under the requirement of considering the wearing comfort of the user, the thicker midsole has a softer touch, and the weight data of the target user and the thickness of the midsole can be set to be in a positive correlation corresponding relationship; for another example, the thickness of the midsole is designed according to the gait data of the target user so as to meet the requirements of sole protection and walking safety during walking, the thickness of the midsole is related to the angle and stability of the joint posture during walking, and the preset thickness of the midsole is determined according to the walking posture of the target user based on the correlation analysis of the thickness of the midsole and the gait data.

The foot pressure data is related to weight data, foot shape profile data, and gait data of a target user, and in one implementation, the predetermined thickness of the midsole is determined based on the foot pressure data of the target user. And determining the preset thickness of the corresponding insole according to the sole pressure distribution states represented by the foot pressure data under the static state and the walking dynamic state respectively.

The physical data includes physical measurement data of the target user, such as evaluation of body parts of the target user, such as knee joints, ankle joints and the like, and is used for determining a movement pattern beneficial to health maintenance of the target user so as to determine a preset thickness of the corresponding insole.

In some embodiments, the predetermined thickness of the midsole may be related to a plurality of factors, such as foot pressure data, body data, foot profile data, etc., of the intended user, and in particular, the predetermined thickness of the midsole may have an adverse effect on different needs. For example, if the predetermined thickness of the midsole is too great, the perception and stability of the sole by the target user may be compromised, and the flexibility may be increased accordingly. When the insole thickness design is carried out by connecting multiple data such as body data, weight data, foot shape profile data, gait data or foot pressure data of the target user, one embodiment is that software modeling simulation is adopted, static pressure and walking dynamic pressure corresponding to the target user are applied to the insole model after the insole model is constructed, performance analysis indexes corresponding to different requirements of the target user are set, the sum is calculated after the different analysis indexes are weighted, and the insole thickness corresponding to the scheme with the best performance sum is output. In some embodiments, the weights of the different analysis metrics may be determined based on the demand bias and health status of the target user.

In certain embodiments, the topological or lattice structure is obtained by 3D printing, including filament melt extrusion, material droplet jetting, powder lay-up melting, binder jetting, or photosensitive resin laminate curing printing. Specifically, a structural model corresponding to the topological structure or the lattice structure of the midsole and performance parameters such as intensity are input to a control device of the 3D printing device, an energy radiation device of the 3D printing device projects an image corresponding to the topological structure or the lattice structure and a radiation energy density corresponding to the structural intensity under the control of the control device, and the material to be cured is printed as an entity of the midsole in a preset three-dimensional structure and intensity.

In certain embodiments, the topological or lattice structure material comprises a light-cured resin material, a thermoplastic rubber (TPR), a thermoplastic elastomer; wherein the thermoplastic elastomer comprises polyurethane elastomer (TPU), nylon elastomer (TPAE), polyester elastomer (TPEE), EVA elastomer and organosilicon elastomer. The lattice structure material may be any one of the above materials, or a mixture of two or more of the above materials.

The thermoplastic elastomer is a kind of elastomer with rubber elasticity at normal temperature and plastifiable molding at high temperature, is a copolymer or a physical mixture of polymers (usually plastics and rubber), and is composed of materials with thermoplastic and elastomer characteristics. In general, thermoplastics are relatively easy to use in manufacturing, for example by injection molding.

In certain embodiments, the topological or lattice structure material may also be polypropylene, Acrylonitrile Butadiene Styrene (ABS), Polycarbonate (PC), PC-ABS, PLA, polystyrene, lignin, polyamide foam, polyamide with additives such as glass or metal particles, methylmethacrylate-acrylonitrile-butadiene-styrene copolymer, absorbable materials such as polymer-ceramic composites, and other similar materials suitable for midsole fabrication, without limitation to the above examples.

In some embodiments, the midsole further comprises a cushioning layer integrally formed by 3D printing on a top surface of the midsole. Referring to FIG. 8, a partial schematic view of a midsole of the present application in one embodiment is shown. As shown in FIG. 8, the cushioning layer 14 is disposed on the surface of the lattice structure of the midsole to provide sufficient cushioning to the user during wear.

In certain embodiments, the buffer layer 14 is composed of a plurality of lattice structures that are 3D printed. The rod diameter or wall thickness of the lattice structure in the buffer layer 14 is smaller than the rod diameter or wall thickness of the lattice structure in the midsole, and the lattice volume of the lattice structure in the buffer layer 14 is smaller than the lattice volume of the lattice structure in the midsole. The buffer layer 14 with the shoe insole prints integrated into one piece through 3D, and the different designs based on lattice structure distinguish shoe insole and buffer layer 14 with the different functions that correspond. The diameter of the basic unit connecting rod of the lattice structure or the wall thickness of the shared surface is related to the strength of the lattice structure, the buffer layer 14 is in a small rod diameter or thin wall structure and is designed to be composed of small-volume lattice basic units, the hardness of the buffer layer 14 is reduced through the connection of the basic units with small rod diameter or thin wall while the strength of the buffer layer 14 is ensured, a buffer structure with low hardness, good elasticity and soft touch is formed on the surface of the insole, and the pressure impact of the contact of the sole and the insole is further weakened.

In some embodiments, the cushioning layer 14 is comprised of a 3D printed topology, the stem diameter of the topology in the cushioning layer 14 being smaller than the stem diameter in the midsole topology; or, the number of the node connections of the topological structure in the buffer layer 14 is smaller than that of the node connections in the midsole topological structure, so as to reduce the hardness of the buffer layer, make the buffer layer easy to generate elastic deformation and realize the buffer function.

The cushioning layer 14 may be contoured to conform to the contours of the upper surface of the midsole, and in actual printing, may be printed as a unitary structure that conforms to the upper surface of the midsole. The cushioning layer 14 may be designed to be of uniform or non-uniform thickness, and typically, the cushioning layer 14 is much less thick than the midsole, conforming to the contour of the midsole. The peripheral contour of cushioning layer 14 may be based on the contour of the midsole, such as by designing the outer contour of the lower surface of cushioning layer 14 to be the same as the outer contour of the upper surface of the midsole, resulting in a natural connection that is free of discontinuities at the midsole.

In some embodiments, the profile design and topology or lattice structure design of the buffer layer 14 is further related to the desired foot pressure data, gait data, foot profile, etc. of the target user, such as the upper surface profile of the buffer layer 14 can conform to the target user foot profile design. In actual walking, the midsole deforms following the cushioning layer 14, impact is absorbed to the sole through the cushioning layer 14, and then the midsole provides a supporting force to the sole, i.e., distributes the adjusted pressure.

Referring to FIG. 9, an article of footwear according to the present application is shown in an exploded view in one embodiment. In some embodiments, the midsole 10 further includes an upper conforming surface integrally formed by 3D printing on a top surface of the midsole 10 for engaging the upper 20.

The upper binding may be utilized to adhesively bond upper 20, which provides an adhesively bondable interface for the attachment of upper 20 to a footwear sole, i.e., upper 20 is utilized to form a covering with midsole 10 that encompasses the foot of the intended user. In one implementation, the upper mating surface may be configured as a ring-shaped structure for providing a ring-shaped contact surface for bonding the upper 20 to the midsole, the outer contour of which is obtained to conform to the contour of the midsole 10. The upper surface and the lower surface of the upper binding surface are respectively bonded with the vamp 20 and the insole 10, and the bonded adhesive comprises neoprene adhesive, polyurethane adhesive, SBS adhesive and the like.

In some embodiments, the midsole 10 includes a cushioning layer integrally formed by 3D printing between the midsole 10 and the upper conforming surface. Namely, the cushion layer is attached to the contour of the midsole 10 and then printed, the upper attaching surface is arranged on the cushion layer, and the upper surface is used for connecting the vamp 20.

In some embodiments, the midsole 10 further includes a lower conforming surface formed by 3D printing on a bottom surface of the midsole 10 for engaging the outsole 30. The outsole 30, i.e., the portion of the sole under the midsole 10 for directly contacting the ground, is generally configured such that the lower surface of the outsole 30 is contoured to increase friction and is made of a wear-resistant material such as natural rubber, synthetic rubber, elastomer, thermoplastic elastomer (TPE), foam, gel-like plastic, combinations thereof, and the like. The lower attaching surface is used to provide a contact surface for bonding the midsole 10 and the outsole 30, and the adhesive for bonding includes neoprene adhesive, polyurethane adhesive, SBS adhesive, etc.

In some embodiments, the lower conforming surface follows the bottom contour of the midsole 10 in a circular configuration. The outer contour of the lower attaching surface conforms to the outer contour of the lower surface of the insole 10, the weight of the sole is reduced by adopting an annular structure, and the insole 10 and the outsole 30 are bonded on the upper and lower contact surfaces of the annular structure.

Based on the shoe midsole for the shoe product provided by the application, aiming at different target users, quantification is carried out according to individual requirements and characteristics of the target users, such as walking malformation state or walking habit, foot shape profile, physiological state, such as sole health, lower limb joints, body stability, original foot pressure distribution state and the like, data obtained by actual measurement are analyzed and evaluated and are associated with the structural design of the shoe midsole, and the preset thickness of the shoe midsole, the three-dimensional profile of the shoe midsole topological structure or lattice structure and the structural strength of different areas of the shoe midsole are selected based on different requirements of the target users, so that the sole pressure of the shoe can be adjusted based on the individual specific conditions of the target users; moreover, the insole is designed into a transition gradual change form between different foot pressing areas with different pressure bearing, so that the insole has good buffering performance.

The present application further discloses an article of footwear, with continued reference to fig. 9, as shown in fig. 9, that includes a midsole 10, an upper 20, and an outsole 30.

Continuing to refer to fig. 1, as shown in fig. 1, the midsole of the article of footwear includes: a rear heel portion 13 corresponding to the heel of the target user, a sole portion 11 corresponding to the forefoot of the target user, a waist portion 12 corresponding to the target user connecting the rear heel portion and the sole portion, the waist portion 12 being provided with a raised portion 121.

Wherein the target user is a user corresponding to the article of footwear, and manufacturing information for the midsole is formed based on information specific to the target user. The heel portion 13 corresponds to a tread portion of a heel of the target user, and the sole portion 11 corresponds to a tread portion of a sole of the target user.

The specific information of the target user is obtained and analyzed according to the personal physical state and the requirement of the target user, and is used for indicating the personalized information of the insole structure design. Or, for a certain type of target user group, the specific information of the target user is a general rule expressed by big data obtained by analyzing characteristics of the group, and is used for obtaining insole manufacturing information applicable to the group of target users, for example: for target users with diabetes, diabetic feet, namely plantar ulceration and callus caused by diabetes, are generally easy to suffer; based on the analysis and statistics of the soles of medically corresponding diabetic foot patients, for the diabetic patients with obvious lesions such as calluses and the like on the soles, the protective areas of the soles can be predetermined based on the analysis and statistics.

At least one first foot pressing and drying area is arranged in the area corresponding to the sole part 11 and the heel part 13, and the stress strength of the topological structure or the lattice structure in the first foot pressing and drying area is smaller than that of the topological structure or the lattice structure outside the first foot pressing and drying area. In some embodiments, the first foot press preparation region is disposed in the ball or heel region, or both. As shown in fig. 1, the sole portion 11 of the midsole is provided with a first foot drying preparation region 111 and another first foot drying preparation region 112, and the rear heel portion is provided with a first foot drying preparation region 131.

The first foot pressing and drying area is an area which needs to disperse and transfer pressure according to specific requirements of the target user, such as a protection part appointed to the foot, a foot ulcer part and the like, or an area which needs to disperse pressure adjustment based on requirements of comfort level of the sole or human body protection and the like, and the specific position of the area is determined by a position area which meets the requirement of the user on sole pressure adjustment. The topological structure or lattice structure design of the first foot pressing dry pre-region is different from that of the foot pressing dry pre-region, so that the natural distribution of pressure in the human body pressing load bearing with a preset effect is met.

In some specific examples, the lattice structure in the interface region is designed in a form in which the basic unit size of the lattice structure is gradually changed; for another example, the basic cell geometry of the lattice structure at the interface region is gradually deformed from the cone outside the first foot press dry pre-region to the basic cell structure formed as a spheroid in the at least one first foot press dry pre-region; for another example, based on the printing process setting, the lattice structure at the interface region extends from outside the first foot drying pre-region toward the first foot drying pre-region, and the corresponding lattice structure basic unit takes the form of gradual material density change.

The unit area, the pressure variation value and the preset value can be set manually, or determined based on medical intervention data of a target user, for example, a pressure peak value suitable for sole maintenance or a pressure variation value of different areas are determined, and after a first foot drying pre-area is determined, a topological structure or a lattice structure located outside the first foot drying pre-area is gradually transited towards a topological structure or a lattice structure extending inside the at least one first foot drying pre-area so as to reduce the pressure peak value outside the first foot drying pre-area or reduce pressure abrupt change of a boundary area; furthermore, the pressure change state suitable for the cushioning of the sole can be determined through the manufacturing process (standard) of the footwear, for example, to enhance the cushioning function of the midsole or the impact resistance, wear resistance and the like of the midsole.

The lattice structure is in the form of a unit structure constituting the midsole, and the shape and position relationship among unit structures represented on a macroscopic scale are similar to those in chemical molecules.

In some embodiments, for lattice structures using tie-bars to form basic cells or lattice structures using planar bodies as basic cells, each of the basic cell structures has the same or approximately the same geometry, i.e., the basic cells in the lattice structure have a certain periodicity therebetween, and the lattice structure also assumes a stretched, distorted, or compressively deformed structure at different locations. The lattice structure can be divided into a plurality of basic unit structures with similar connection forms on the basis of adopting connection keys or common planes with spatial directions, and the whole structure is formed by stacking basic geometric units. The 3D structure of the insole composed of the lattice structure is subjected to certain deformation treatment on the basic unit structures at different positions, for example, the basic units at the outer contour of the insole conform to contour design, different deformation treatment such as stretching, twisting or compression and other deformation structures are presented at different positions, and the deformation treatment is the adjustment of the connection form of the basic unit structures under the state without external pressure so as to conform to the shape design of the insole. The deformation process for the base unit may be a stretching transformation or twisting process in the length, width, height, or two or more directions of the lattice base unit, based on the overall profile design and strength design decisions in different directions for the lattice structure of the midsole.

In certain embodiments, the geometric structure comprises a combination of one or more of a polyhedron, a face, a cone, a rhomboid, a star, and a spheroid. For the lattice structure of the basic unit formed by the connecting rods, the solid structure of the insole corresponds to the edges of the basic geometric unit bodies, namely the connecting rods of the edges of the geometric structure form a corresponding lattice structure; for a lattice structure with a hollow polyhedron as a basic unit, the solid structure of the insole corresponds to the wall surface of the basic geometric unit, wherein the wall surface comprises a plane, an arc surface or a curved surface. The insole can adopt a simple geometric structure as a basic unit of the lattice structure, can also adopt a combination of various geometric structures to form the basic unit of the lattice structure, and can also be arranged into different basic geometric unit structures in different position areas, for example, a rhombohedral structure is adopted at the waist part as the basic unit, and a polyhedron is adopted at the heel part or the sole part as the basic unit.

The topological structure is a hollowed-out connector formed by connecting different rod bodies based on a common node, wherein the entity of the insole topological structure is the rod body. The connection mode of the topology structure can be set based on human needs, for example, the end point of each rod in the topology structure and at least one rod common end point, each end point correspondingly has a common connection number, here, the common connection number can be preset to different values such as 2, 3, 4, 5, 6, etc., and the common connection number is the total number of rods connected at the node; furthermore, the connection direction of the rods in the topology structure may be set arbitrarily, and in some examples, the topology structure may be optimized, so that the overall order of the topology structure is increased, for example, the number of common connections at each node in the topology structure is the same.

Meanwhile, in the state of bearing external pressure, the topological structure or the lattice structure has rigidity or elastic deformation capacity of resisting stretching, torsion and shearing corresponding to different stress modes, namely has certain strength. For example, the topology or lattice structure within the first foot preparation region may have a strength less than the topology or lattice structure outside the first foot preparation region to effect a pressure distribution transfer from the first foot preparation region to other regions of the midsole when bearing weight. In a specific embodiment, the correspondence between the strength of the topological structure or the lattice structure and the endured pressure, shearing force, etc. can be obtained based on a strength performance test on the topological structure or the lattice structure, wherein the test can be an actual test on the topological structure or the lattice structure, or a stress-strain relationship is adopted to perform a simulation calculation in combination with the performance of the material itself, or the simulation calculation is compared with a design test result to associate the strength of the crystal structure with the lattice structure or associate the form of the topological structure with the strength of the topological structure.

In some examples, the bulk density of the lattice structure is related to the rod diameter thickness, lattice wall thickness, lattice size, density of the lattice rod body after molding; or the volume density of the topological structure is related to the rod diameter thickness, the wall surface thickness and the density of the molded topological structure rod body or surface body.

The solid structure of the lattice structure is in a form of a connecting rod or a wall surface, the volume density of the lattice structure is related to the length, the diameter, the connection density, the wall surface thickness and the like of the connecting rod of the basic unit, and when the insole is filled with the material with uniform density, the volume density can represent the material usage amount in unit volume. Generally, when the connection form of the basic units of the lattice structure is determined, the stress strength of the lattice structure is positively correlated with the volume density of the lattice structure, and when the basic units of the lattice structure are smaller, namely the length of the connecting rods is smaller, the corresponding volume density is larger, so that the lattice structure of the insole has greater strength; or, when the diameter of the rod diameter of the connecting rod is larger, the corresponding volume density is larger, and the lattice structure of the insole has higher strength; for example, two lattice structures having different valences at the joint of the connecting rod and the node bar in the basic unit are generally different in volume density and structural strength from each other in accordance with lattice structure units having different connection methods.

In certain embodiments, for lattice structures connected in a common plane, the bulk density of the lattice structure is related to the thickness of the walls of the base unit, i.e., the wall thickness, the size of the base unit, and the geometry of the base unit. Generally, the wall thickness of the basic unit is positively correlated with the bulk density, for example, when the wall thickness of the basic unit is increased, the bulk density of the lattice structure is increased, and at the same time, the strength of the lattice structure is increased; as another example, when the basic cell wall thickness and geometry are determined, and when the basic cell size is scaled down, a lattice structure with increased bulk density is obtained, while having greater strength. For the shoe midsoles with different basic units in different geometric structures, the shoe midsoles can also have different structural strengths, for example, the basic units are respectively two lattice structures of tetrahedrons and spheroids, and the shoe midsoles have different strength properties such as tensile strength, compressive strength, shearing strength and the like.

In an example, the volume density distribution of the topological structure is determined by setting the thickness of the rod diameter of the topological structure in each unit area or the thickness of the surface body of the topological structure, so as to realize that different areas of the insole topological structure bear pressure according to a preset pressure distribution rule, for example, when the material density of the rod body in the topological structure is uniform, the rod diameter of the rod body in the topological structure in each unit area is increased, so that the volume of the rod body in each unit area is increased, and the volume density of the topological structure in the corresponding unit area is increased.

With continued reference to fig. 2a and 2b, as shown in fig. 2a and 2b, after at least one first foot preparation region of the midsole is determined, the rod diameters of the lattice structure basic units extending from the outside of the first foot preparation region to the first foot preparation region are gradually decreased (in the direction of X conforming to the arrow in fig. 2a and 2 b), and correspondingly, the volume density of the lattice structure is gradually decreased from the outside of the first foot preparation region to the inside of the first foot preparation region, so that the strength of the lattice structure outside of the first foot preparation region is gradually decreased toward the strength of the lattice structure extending from the first foot preparation region. In one embodiment, the rod diameters of the basic units of the lattice structure extending from the lattice structure outside the first foot drying region to the first foot drying region are gradually reduced, so that the lattice structure as a whole has no shape transition.

Please refer to fig. 2c and fig. 2d, which show schematic diagrams of partial structures of the midsole with basic units having another geometric structure, as shown in the figures, the basic units in the midsole are hole-like hexagonal bodies, the lattice structure entity corresponds to a connecting rod as the side length of the hexagon, and the volume density of the lattice structure extending from the lattice structure outside the first foot drying pre-region to the first foot drying pre-region is gradually reduced; in one implementation, such as the illustrated embodiment, the rod diameters of the lattice structure base units are tapered in a direction extending toward the first foot press dry region (in the X direction following the arrows in fig. 2c, 2 d).

The gradual transition of the lattice structure outside the first foot pressing and drying pre-region towards the lattice structure extending into the at least one first foot pressing and drying pre-region can also be realized by setting the size of the basic unit, including but not limited to gradually increasing the rod diameter length of the lattice structure outside the first foot pressing and drying pre-region towards the lattice structure basic unit of the first foot pressing and drying pre-region, gradually reducing the volume density of the corresponding lattice structure basic unit, and gradually reducing the stress intensity.

Here, the gradual transition of the lattice structure extending from the lattice structure of the crystal structure located outside the first foot drying pre-region to the first foot drying pre-region may be determined based on the specific type of the adopted lattice structure, for example, when the lattice structure is a planar body in which pores exist between different basic units, the gradual transition of the lattice structure may also be achieved by gradually increasing the size of the pores and gradually decreasing the volume density of the corresponding basic units of the lattice structure in a direction toward the first foot drying pre-region. The lattice structure alternatives and the manner in which the graded transition is achieved are not limiting of the illustrated embodiments.

With continued reference to fig. 2e, a schematic view of a portion of the midsole topology of an embodiment is shown. The topology shown in fig. 2e has a first foot dry-out region, wherein the rod diameter of the rod in the first foot dry-out region is smaller than the rod diameter of the rod outside the first foot dry-out region, and the rod diameter changes to a gradual deformation form; as shown, the rod diameters in the topology decrease in a direction toward the first foot preparation area such that the volumetric density of the topology extending from the topology outside the first foot preparation area toward the first foot preparation area decreases.

Here, it should be understood that, the gradual transition of the topology or the lattice structure outside the first foot drying pre-region toward the topology or the lattice structure extending into the at least one first foot drying pre-region includes gradual transition of the strength of the topology or the lattice structure corresponding to the interface region, that is, the corresponding pressure distribution.

In a further embodiment, the gradual transition may also be achieved by a change in the printing material, for example, by using printing materials of different hardness, so that printed topologic or lattice structures of the printing materials of different hardness have different strengths, thereby achieving a gradual transition of the printed topologic or lattice structures located outside the first foot drying pre-region and extending towards the first foot drying pre-region by the gradual change in the hardness of the printing materials.

For example, in yet another embodiment, the midsole is formed using a 3D printing process, wherein the topology or lattice structure extending outside the first foot preparation region towards the topology or lattice structure extending within the at least one first foot preparation region during the radiation forming process is configured to gradually change the received energy density, e.g., the energy density gradually decreases in a direction of the extending direction, such that the cured topology or lattice structure gradually decreases in strength.

In another embodiment, the gradual transition may also be achieved by a post-treatment process, such as removing a portion of the rods of the lattice structure to change the strength of the lattice structure, or removing a portion of the rods of the lattice structure to reduce the number of node connections to change the strength of the lattice structure; for another example, in the midsole manufactured based on the 3D printing process, in the post-curing step of the printed midsole through 3D printing, the topology structure or the lattice structure outside the first foot drying region and extending toward the inside of the at least one first foot drying region is irradiated by light sources with different intensities, and the like.

As shown in fig. 3a, the lattice structure of the midsole of the article of footwear employs different forms of attachment or different bulk densities in different regions. In the forefoot and heel regions of the midsole, first foot drying zones are provided, which correspond to the regions of the embodiment shown in fig. 3a in which the lattice density is reduced, such as first foot drying zone 111 of the sole portion 11, another first foot drying zone 112, and first foot drying zone 131 of the heel portion 13, whose corresponding lattice structures have a reduced bulk density. Designing based on weakening of the lattice structure strength of the first foot pressing pre-region; in some examples, the midsole may also adopt a topology structure, and a plurality of first foot drying regions are disposed therein, and the strength of the topology structure corresponding to the first foot drying regions is weakened in the design or manufacture of the midsole by determining table variables such as printing process, volume density, and the like, which determine the strength of the topology structure, wherein the pressure applied to the midsole in a treaded state is naturally dispersed to a region corresponding to a greater structural strength other than the first foot drying regions to achieve the balance of the supporting force and the pressure to the human body.

With continued reference to fig. 3b, in some embodiments, at least one second foot drying zone is provided in the midsole, wherein the midsole may adopt a lattice structure (as shown in fig. 3 b) or a topological structure (not shown), and at least one second foot drying zone is provided in the midsole, such as second foot drying zone 113 shown in fig. 3b, wherein the second foot drying zone 113 is located at a heel portion, a sole portion, or a fossa portion of the midsole; the topological structure or the lattice structure outside the second foot pressing pre-region is in gradual transition towards the topological structure or the lattice structure extending into the at least one second foot pressing pre-region, so that the stress intensity of the topological structure or the lattice structure in the at least one second foot pressing pre-region 113 is greater than the stress intensity of the topological structure or the lattice structure outside the at least one second foot pressing pre-region 113.

Here, the topological structure or the lattice structure outside the second foot drying region is in transition gradual change towards the lattice structure inside the at least one second foot drying region, and in some examples, the transition gradual change is achieved by setting at least one of the determinants of the stress strength of the topological structure or the lattice structure, such as the volume density of the lattice structure, the crystal lattice body structure, the topological structure volume density, the printing material, the printing process and the post-processing process.

With continued reference to fig. 4a and 4b, a schematic perspective view and a schematic plan view of a lattice structure of a midsole of an article of footwear of the present application in one embodiment are shown, respectively. As shown in the figure, the basic units of the lattice structure adopt a rod diameter connection form, wherein the basic units are gradually increased in rod diameter along the X direction, namely, the basic units become thicker, the X direction corresponds to the direction extending from the outer part of the second foot pressing and drying area to the outer part of the second foot pressing and drying area of the insole, and based on the arrangement of the basic units of the lattice structure, the stress intensity of the lattice structure positioned outside the second foot pressing and drying area towards the lattice structure positioned in the at least one second foot pressing and drying area is gradually increased, and the corresponding borne sole pressure is gradually increased.

With continued reference to fig. 4c, a structural diagram of a partial region of the topology structure of the midsole in an embodiment is shown, as shown in the drawing, the rod diameter of the connecting rod body in the topology structure gradually increases along the direction X, where the direction X corresponds to a direction extending from the outside of the second foot pressing pre-region to the second foot pressing pre-region of the midsole, and based on this arrangement, the stress intensity of the topology structure located outside the second foot pressing pre-region toward the topology structure within the at least one second foot pressing pre-region gradually increases, and the corresponding sole pressure borne gradually increases.

Here, it should be understood that the influence factors of the stress intensity of the topological structure or the lattice structure of the second foot drying pre-region corresponding to the first foot drying pre-region are similar, and the arrangement of the basic units of the lattice structure in different regions or the design of the topological structure in different regions are that the expected distribution state of the pressure distribution of the middle sole when the shoe is worn is realized. The topological structure or the lattice structure outside the second foot pressing pre-region is made to gradually transition towards the topological structure or the lattice structure inside the at least one second foot pressing pre-region, and the method can also be realized through a printing process, a post-treatment process, a printing material and the like, and compared with the method that the topological structure or the lattice structure outside the first foot pressing pre-region is made to gradually transition towards the topological structure or the lattice structure inside the at least one first foot pressing pre-region, the specific implementation mode is similar, and the description is omitted; accordingly, the adjustment of the basic cell or topology of the lattice body in accordance with the extension direction is usually opposite, since the transition is gradually reduced and gradually increased, respectively, from the extension of the first foot stem region to the first foot stem region and from the extension of the second foot stem region to the second foot stem region.

In particular, the first and second foot drying zones may each determine a zone distributed in the midsole based on desired foot pressure data for a target user. In certain embodiments, the intensity of the topology or lattice structure of the second foot pressure intervention region is correlated to calculated expected foot pressure data, wherein the expected foot pressure data is greater than measured foot pressure data corresponding to the at least one second foot pressure intervention region.

Particularly, for the same target user, after a first foot drying pre-region is determined, the design is carried out, and the sole pressure born by the part outside the first foot drying pre-region is naturally increased; or, after the second foot drying pre-region is determined, the design is carried out, and the sole pressure born by the part outside the second foot drying pre-region is naturally reduced. That is, the effect of pressure adjustment can be achieved by determining the first foot drying pre-region or the second foot drying pre-region for design. Of course, the first foot drying area and the second foot drying area may be determined simultaneously based on the expected foot pressure data and the measured foot pressure data to define the area for bearing the dispersed pressure while determining the area to be subjected to pressure dispersion, as in the embodiment shown in fig. 3a and 3 b.

The actually measured foot pressure data is the human body sole pressure measured in a state without external adjustment, such as the human body sole pressure of a bare foot standing naturally. The foot pressure data, namely the pressure value corresponding to the foot pressure intervention area in the expected foot pressure data is smaller than the corresponding actual measurement pressure value of the human foot corresponding to the foot pressure intervention area under the state without insole adjustment. In one implementation, the measured foot pressure data (which is the unadjusted foot pressure data) in the same human body posture may be determined to set the corresponding expected foot pressure data, such as the foot pressure data of the target user on the plane in the natural standing state without leaning, the expected foot pressure data in the natural standing state is set based on the foot pressure data, and the expected foot pressure data value of the first foot drying prediction area is set to be smaller than the measured value of the corresponding foot area. In an application scenario, the first foot pressure pre-drying area may be an area where the foot is pressed greatly in a natural standing state, and is adapted to the requirements of comfort and foot protection, and the expected foot pressure data value in the area is obtained by performing pressure dispersion adjustment on the corresponding area in the measured data, so that the expected foot pressure data in the foot pressure pre-drying area is reduced.

With continuing reference to fig. 5 and 6, the simulated diagram of the measured human body test pressure distribution as shown in fig. 5 and the simulated diagram of the sole pressure distribution corresponding to the adjusted expected foot pressure data as shown in fig. 6 are shown, wherein the numerical value in each cell is the average pressure in the region, the numerical value displayed by different regions of the sole can obtain the corresponding sole pressure distribution state, the numerical value is determined by the actual foot pressure value or the expected foot pressure value and the selected pressure unit, and for the same sole pressure distribution diagram, the larger the numerical value is, the larger the average pressure in the corresponding unit region is. In the pressure distribution diagram, the size of each cell may be set based on selection, and is not limited by the actually measured foot pressure data density, for example, in the simulation diagram of the actually measured sole pressure distribution shown in fig. 5, the numerical value displayed in each cell may be a pressure value measured by 1 pressure sensor, or an average value of the measured values of 4 pressure sensors arranged in a square, and the range of each display cell may be set artificially based on the rule of displaying the foot pressure distribution; meanwhile, the numerical values in the foot pressure distribution diagram are different based on the selection of the foot pressure units, and different numerical values can be set and displayed based on different pressure units for the same foot pressure data.

Based on the foot pressure data of the target user in the natural state in fig. 5, the relative high pressure region and the low pressure region in the range of the sole of the foot of the target user are determined. As shown in fig. 5, in the non-adjusted state, the arch region of the human body corresponds to a smaller pressure value, such as the region where the pressure value is shown as 0 in the embodiment shown in fig. 5, in some practical situations, the arch region is not in contact with the pressure plate, i.e. the pressure value in this region is 0, such as the region where the pressure value is shown as 0 in the embodiment shown in fig. 5, and the relatively high pressure region is generally located at the ball part and the heel part (such as the region where the

numbers

As shown in fig. 5, in a natural state without external action, the arch region of the human body generally shares a smaller sole pressure, and in some embodiments, based on the pressure adjustment requirement for the heel region or the half-sole region of the foot, such as reducing the pressure peak in the high pressure region, the pressure in the region is partially transferred to the arch region to achieve the pressure dispersion effect, i.e., to assume the pressure distribution state as shown in fig. 6; or, based on the determined area corresponding to the foot pressure peak value, the pressure is adjusted to the half sole area, the heel area and the arch area outside the pressure peak value in order to reduce the pressure peak value.

Meanwhile, the gait data is related to the physical functions of the target user, for example, elderly people generally have lower walking speeds and smaller strides, and the time for the sole to stand while being supported by both feet in walking becomes longer. The strength of the topological structure or the lattice structure is related to the human body touch feeling in wearing, and comprises rigidity or hardness, and the strength of the topological structure or the lattice structure can be set to have higher toughness and lower hardness for a target user with longer support period of the double feet in gait data analysis.

With continued reference to fig. 7, the dimple portion 12 corresponds to the arch of the target user's foot, and the preset height of the dimple rising portion 121 matches the arch height of the target user's foot.

In some embodiments, the raised portion 121 of the waist socket portion has a predetermined height to support the arch of the target user. In a natural standing state or a walking state, the pressure applied to the sole of a human body is mainly distributed on the sole part and the heel part. During the process of foot pressure distribution, pressure is transferred to a non-foot-pressure-dry area, such as the arch area. By setting the preset height and strength of the bulge of the fossa portion, a contact surface for bearing dispersed pressure is provided for the arch portion. Specifically, the height of the raised part 121 of the waist socket portion and the force intensity thereof are related to the calculated expected foot pressure data and foot shape profile data of the target user.

In one embodiment, the height of the dimple ridge 121 is determined based on the foot profile of the target user, such that the dimple profile curve substantially conforms to the target user's arch profile curve according to the arch form of the target user. Specifically, the force strength of the raised portion 121 of the waist socket portion is correlated with the desired foot pressure data and the foot shape profile data of the target user. The expected foot pressure data may be calculated based on measured foot pressure data of the measurement target user and corresponding medical intervention data. According to the preferred mode of adjusting the distribution of plantar pressure to the target user, a desired distribution map of plantar pressure is designed and combined with the foot shape profile of the target user so that the adjusted plantar pressure is distributed in a desired manner. The contour design and the strength design of the lattice structure of the waist socket part are used for realizing the adopted pressure distribution scheme, so that the waist socket part can bear the pressure with the expected effect and has reliable strength when the shoe insole is worn. Based on the analysis of the relation between the strength of the topological structure or the lattice structure and the stress, the expected strength corresponding to the topological structure or the lattice structure is obtained through calculation on the basis of the known pressure distribution.

In certain embodiments, the topological or lattice structure material comprises a light-cured resin material, a thermoplastic rubber (TPR), a thermoplastic elastomer; wherein the thermoplastic elastomer comprises polyurethane elastomer (TPU), nylon elastomer (TPAE), polyester elastomer (TPEE), EVA elastomer and organosilicon elastomer. Thermoplastic polyurethane elastomer (TPU), nylon, thermoplastic elastomer (TPE), nylon elastomer (TPEE), polyester elastomer (TPEE), silicone elastomer, thermoplastic rubber TPR, or a photocurable resin material. The topological structure or lattice structure material can be any one of the materials or a mixture of more than two materials.

In certain embodiments, the material of the topological or lattice structure may also be polypropylene, Acrylonitrile Butadiene Styrene (ABS), Polycarbonate (PC), PC-ABS, PLA, polystyrene, lignin, polyamide foam, polyamide with additives such as glass or metal particles, methylmethacrylate-acrylonitrile-butadiene-styrene copolymer, absorbable materials such as polymer-ceramic composites, and other similar materials suitable for midsole fabrication, the lattice structure being made of materials that are not limited to the above examples.

With continued reference to fig. 8, in some embodiments, the midsole further includes a cushioning layer 14 integrally formed on a top surface of the midsole by 3D printing, the cushioning layer 14 being disposed on a surface of the lattice structure of the midsole for providing sufficient cushioning to a user during wear.

In certain embodiments, the buffer layer 14 is composed of a plurality of lattice structures that are 3D printed. The rod diameter or wall thickness of the lattice structure in the buffer layer 14 is smaller than the rod diameter of the lattice structure in the midsole, and the lattice volume of the lattice structure in the buffer layer 14 is smaller than the lattice volume of the lattice structure in the midsole. The buffer layer 14 with the shoe insole prints integrated into one piece through 3D, and the different designs based on lattice structure distinguish shoe insole and buffer layer 14 with the different functions that correspond. The diameter of the basic unit connecting rod of the lattice structure or the wall thickness of the common surface is related to the strength of the lattice structure, the buffer layer 14 adopts a structure with a small rod diameter or a thin wall surface and is designed to be composed of the small-volume lattice basic units, the hardness of the buffer layer 14 is reduced through the connection of the basic units of the small rod diameter or the thin wall surface while the strength of the buffer layer 14 is ensured, a buffer structure with low hardness, good elasticity and soft touch is formed on the surface of the insole, and the pressure impact of the contact of the sole and the insole is further weakened.

In some embodiments, the profile, topology, or lattice structure of the buffer layer 14 is also related to the desired foot pressure data, gait data, foot profile, etc. of the target user, such as the upper surface profile of the buffer layer 14 can conform to the target user foot profile design. In actual walking, the midsole deforms following the cushioning layer 14, impact is absorbed to the sole through the cushioning layer 14, and then the midsole provides a supporting force to the sole, i.e., distributes the adjusted pressure.

In some embodiments, the midsole further comprises an upper mating surface integrally formed by 3D printing on a top surface of the midsole for engaging an upper of an upper.

Referring to fig. 10, which is a simplified structural schematic diagram of an embodiment of the footwear of the present application, as shown in fig. 10, the upper attaching surface may be used for bonding the upper 20, and the upper attaching surface provides a bondable contact surface for the connection of the upper 20 and the sole, and in one implementation, the upper attaching surface may be designed to have a ring-shaped structure for providing a ring-shaped contact surface for bonding the upper 20 and the midsole 10, and the outer contour of the upper attaching surface conforms to the contour of the midsole 10. The upper surface and the lower surface of the upper binding surface are respectively bonded with the vamp 20 and the insole 10, and the bonded adhesive comprises neoprene adhesive, polyurethane adhesive, SBS adhesive and the like.

In some embodiments, the midsole includes a cushioning layer integrally formed by 3D printing between the midsole and the upper conforming surface. Namely, the buffer layer is attached to the contour of the insole and continuously printed, the upper attaching surface is arranged on the buffer layer, and the upper surface is used for connecting the vamp.

The upper 20 is intended to form a covering with the midsole for surrounding the foot of the intended user, and the upper 20 is disposed at the top periphery of the midsole by bonding and forms a shoe structure with the midsole 10 for covering the foot of the intended user. The material of upper 20 includes polyurethane leather, natural leather, ultra-fine fibers, mesh, EVA, and other materials having properties suitable for manufacturing upper 20, such as air permeability, wear resistance, and elasticity.

In some embodiments, the midsole 10 further includes an outsole 30 coupled to a bottom of the midsole 10 for contacting the ground.

In some embodiments, the midsole 10 further includes a lower conforming surface formed by 3D printing on a bottom surface of the midsole 10 for engaging the outsole 30. The outsole 30, i.e., a sole component for directly contacting the ground under the midsole 10, is generally configured such that the lower surface of the outsole 30 is contoured to increase friction and is made of a material having wear resistance, such as natural rubber, artificial rubber, polymer urethane synthetic material, polyvinyl chloride, thermoplastic polyurethane elastomer, or the like. The lower attaching surface is used to provide a contact surface for bonding the midsole 10 and the outsole 30, and the adhesive for bonding includes neoprene adhesive, polyurethane adhesive, SBS adhesive, etc.

In some embodiments, the lower conforming surface follows the bottom contour of the midsole 10 in a circular configuration. The outer contour of the lower attaching surface conforms to the outer contour of the lower surface of the insole 10, the weight of the sole is reduced by adopting an annular structure, and the insole 10 and the outsole 30 are bonded on the upper and lower contact surfaces of the annular structure. The contour of outsole 30 may be designed based on the contour of midsole 10 to match the contour of midsole 10 and to fit the foot size of the intended user.

In some embodiments, the dimensions or relaxation of upper 20 are related to foot contour data obtained from measurements taken of the target user. For example, the dimensions and relaxation of the upper 20 are designed to conform to the foot profile of the target user based on the foot profile data of the target user; alternatively, upper 20 may be designed to provide a predetermined clearance between the interior contour of upper 20 and the instep of the intended user. The dimensions and the degree of relaxation of upper 20 are selected for design based upon the foot surface width and height of the intended user.

The dimensions, i.e., the size of the three-dimensional contour of upper 20, and the relaxation, i.e., the adjustability or flexibility of upper 20, may be used to evaluate the longitudinal, lateral extensibility and bending characteristics of upper 20.

In some embodiments, the dimensions or relaxation of upper 20 are related to measured gait data of the target user. The dimensions or relaxation of the footwear upper 20 are determined based on the gait data of the target user by determining the change in the foot-side profile of the target user in motion, such as the state of the foot-side and the degree of flexion, e.g., by selecting a highly ductile material in the heel region where flexion is likely to occur to increase the relaxation in the area of flexion.

In some embodiments, the dimensions or relaxation of upper 20 are correlated to measured foot contour data and gait data for the target user. The shoe upper 20 is influenced by the foot profile and the motion habit of the target user in the static state and the motion state, and the shoe upper material and the shoe upper structure design which are suitable are selected.

In some embodiments, the design of upper 20 also references the foot health status of the target user. For example, for a target user with a foot surface that is traumatic, upper 20 may be selected to be a breathable material that is flexible and light in texture for medical care purposes, and to ensure that upper 20 has sufficient slack.

In some embodiments, the article of footwear is an orthopedic shoe. The orthopedic footwear is an article of footwear having a orthotic function that is suitable for use in response to a population of users in need of foot orthotic, i.e., an article of footwear that helps maintain or substantially maintain a normal gait for an abnormal foot. For example, footwear specially made for users with abnormal feet due to congenital foot deformity, acquired foot diseases such as ankle lesion caused by poliomyelitis, foot aging, and foot deformation caused by poor gait habits. Specifically, based on the pressure distribution acquisition and medical state analysis of different foot states of a target user, and combining the foot profile of the target user, the corresponding structure and material of the footwear are determined according to the design method of the insole, the vamp and the outsole of the footwear provided by the application.

It is to be understood that the orthopedic footwear is a generic term for footwear whose structural design has a function of correcting the foot, and of course includes footwear such as an orthopedic boot or an orthopedic shoe. The correcting function is mainly used for adjusting the pathological changes or abnormalities of the sole, and the correcting effect on the diseases or abnormalities of the sole can be embodied as treatment, prevention or relieving and the like.

In some embodiments, the orthopedic footwear is a diabetic foot footwear, which may also be referred to simply as a diabetic foot footwear. The diabetic foot shoes are the footwear products which are manufactured according to the possibility of foot diseases or lesions caused by diabetes, which are specific to the feet of target users with diabetic feet, and have the applicable correction or orthopedic function for the user groups with the diabetes. For diabetic foot patients, the metatarsus and the heel are usually areas with high callus development, while the maximum pressure of the sole is generally considered to have higher correlation with foot lesions medically, and the maximum pressure of the sole of a diabetic foot is probably the foot ulcer. By the footwear, aiming at a target user with the diabetic foot disease, the footwear reduces the pressure peak value of the sole of the target user, increases the contact area of the sole, and can selectively design the sole structure aiming at the sole pathological change area or the planned protection area of the target user to relieve the area pressure, thereby realizing the function of the diabetic foot shoe. The proposed protection area is a high-incidence area of diseases such as calluses, ulcers and the like acquired by actual measurement foot pressure data and gait data of a target user according to medical statistical analysis and a diabetic patient without obvious foot bottom disease wounds.

The present application also provides a three-dimensional data processing method for a midsole of an article of footwear that can be used to form a three-dimensional data slice for a 3D printing device.

Referring to fig. 11, a schematic flow chart of an embodiment of a three-dimensional data processing method according to the present application is shown, where the three-dimensional data processing method includes the following steps:

in step S100, a midsole of a target user is modeled to form a three-dimensional midsole model having a preset contour.

In some embodiments, the initial three-dimensional contour of the midsole is created based on a last or based on foot contour data of a target user to obtain a model contour that conforms to the foot shape of a particular target user or to the rules of the foot shape of a group of target users.

In some embodiments, a midsole of a target user is modeled based on foot pressure data and foot shape profile data of the target user, wherein the foot pressure data includes measured foot pressure data and desired foot pressure data of the target user. Specifically, in the process of determining the outline of the three-dimensional midsole model, a three-dimensional outline conforming to the foot shape of the target user is obtained in advance based on foot shape outline data of the target user, for example, the size of the outline of the midsole is determined, the three-dimensional outline of the midsole is further adjusted based on foot pressure data of the target user, for example, an area where the foot pressure of the target user is abnormal, such as a high foot pressure area, is determined according to the foot pressure data, and the thickness of the sole corresponding to the area is reduced, so that the foot pressure shared by the area in the wearing state of the obtained midsole entity is reduced.

In some embodiments, the step S100 further includes a step of disposing a basic unit of the lattice structure in the region of the midsole model or disposing a topological structure in the three-dimensional contour of the midsole model, wherein the topological structure or the structure and the properties of a plurality of basic units of the lattice structure are related to the expected strength of the midsole topological structure or the lattice structure, and determining the strength design of the topological structure or the lattice structure according to the expected strength of the corresponding entity of the midsole model, so as to determine the structural characteristics of the topological structure in different regions or determine the basic unit forms of the lattice structure in different regions in the midsole and perform modeling. In a specific implementation mode, a plurality of preset basic units with a lattice structure can be used for modeling the insole of a target user to form an insole model with the lattice structure; or, the outline of the three-dimensional insole model is predetermined, and the insole model is filled based on the selected basic units with the lattice structure; or modeling the midsole of the target user by utilizing the topological structure to form a preset midsole model outline; or filled with a topology after contouring the midsole model.

In some examples, in the step of modeling the midsole of the target user to form the three-dimensional midsole model having the predetermined contour, a lattice structure is disposed in the determined midsole model contour to fill a midsole contour region to form the midsole model, where the lattice structure of the midsole model is in a tensile, torsional, or compressive deformation structure at different positions of the three-dimensional midsole model in step S100.

In some embodiments, for lattice structures using tie bars to form basic units or lattice structure models using planar bodies as basic units, each of the basic unit structures in the lattice structure has the same or approximately the same geometric structure, that is, the basic units in the lattice structure have a certain periodicity therebetween, and the lattice structure also has a tensile, torsional or compressive deformation structure at different positions. The lattice structure can be divided into a plurality of basic unit structures with similar connection forms on the basis of adopting connection keys or common planes with spatial directions, and the whole structure is formed by stacking basic geometric units. The 3D structure of the insole composed of the lattice structures is subjected to certain deformation treatment on the basic unit structures at different positions, for example, the basic units at the outer contour position of the insole are conformed to the contour design of the insole, different deformation treatment such as stretching, twisting or compression and other deformation structures are presented at different positions, and the deformation treatment is the adjustment of the connection form of the basic unit structures of the lattice structures in the three-dimensional insole model under the state without external pressure so as to conform to the shape design of the insole.

In certain embodiments, the geometry of the lattice structure comprises a combination of one or more of polyhedra, facets, cones, diamonds, stars, and spheroids. Wherein, for the lattice structure of the basic unit formed by the connecting rods, the solid structure of the insole corresponds to the edge of the basic geometric unit body; for a lattice structure with a hollow polyhedron as a basic unit, the solid structure of the insole corresponds to the wall surface of the basic geometric unit, wherein the wall surface comprises a plane, an arc surface or a curved surface. The insole can adopt a simple geometric structure as a basic unit of the lattice structure, can also adopt a combination of various geometric structures to form the basic unit of the lattice structure, and can also be arranged into different basic geometric unit structures in different position areas, for example, a rhombohedral structure is adopted at the waist part as the basic unit, and a polyhedron is adopted at the heel part or the sole part as the basic unit.

In step S100, the three-dimensional midsole model includes: the sole comprises a heel part corresponding to the heel of a target user, a sole part corresponding to the front sole of the target user and a waist socket part which is positioned between the heel part and the sole part and corresponds to the arch of the target user, wherein the waist socket part is provided with a bulge part with a preset height for matching the arch of the target user.

Wherein the target user is a user corresponding to the article of footwear, and manufacturing information for the midsole is formed based on information specific to the target user. The heel part corresponds to the stepping part of the heel of the target user, and the sole part corresponds to the stepping part of the sole of the target user.

In some embodiments, the raised portion of the waist pocket has a predetermined height to support the arch of the target user. In a natural standing state or a walking state, the pressure applied to the sole of a human body is mainly distributed on the sole part and the heel part. During the process of foot pressure distribution, pressure is transferred to a non-foot-pressure-dry area, such as the arch area. By setting the preset height and strength of the bulge of the fossa portion, a contact surface for bearing dispersed pressure is provided for the arch portion. Specifically, the height of the raised part of the waist socket part and the force intensity thereof are related to the calculated expected foot pressure data and foot shape profile data of the target user.

In step S100, the waist socket portion is used for bearing dispersed pressure based on the purpose of distributing plantar pressure of the target user, and a raised portion with a preset height of the waist socket portion is determined according to the foot shape profile of the target user to match the arch of the foot of the target user, so that the effect of pressure sharing is achieved.

In one embodiment, the height of the raised portion of the waist in the three-dimensional model is determined based on the foot profile of the target user, such that the contour curve of the waist substantially conforms to the contour curve of the arch of the target user according to the arch form of the target user.

In step S110, the three-dimensional midsole model is processed using the obtained foot pressure data and foot shape profile data of the target user to determine at least one first foot drying preparation region in a heel and/or ball portion of the three-dimensional midsole model.

In some embodiments, step S110 further includes a step of processing the three-dimensional midsole model using the obtained foot pressure data and foot contour data of the target user to determine at least one second foot pressure preparation region in the three-dimensional midsole model.

In some embodiments, the foot pressure data and foot shape profile data of the target user are obtained by measurement or statistics.

Whereby the three-dimensional midsole model is processed to determine at least one first foot drying preparation region or/and a second foot drying preparation region in a heel and/or ball portion of the three-dimensional midsole model through measurement or statistical analysis of the obtained foot pressure data and foot shape profile data of the target user.

At least one first foot drying pre-region is arranged in the region corresponding to the sole part and the heel part, for example, the foot drying pre-region is arranged in the sole part or the heel part, or both the sole part and the heel part. When the sole of the target user is located at the sole part relative to the high-pressure area or the pressure peak value or the sole part of the target user has a sole wound based on the sole pressure adjusting requirement of the target user, in order to relieve the pressure of the sole part, at least one first foot drying pre-area can be arranged in the high-pressure area; or, the sole relative high-pressure area or pressure peak of the sole of the target user is at the heel part or the heel part of the target user has a sole wound, and at least one first foot pressing and drying area can be arranged at the heel part; or, the sole part and the heel part are provided with relative high-pressure areas which may cause sole injury, and the sole part and the heel part can be provided with a first foot pressure pre-pressing area at the same time so as to determine that pressure relief is carried out on the sole corresponding to the areas. In some embodiments, the abnormal foot pressure region in the foot-shaped outline corresponding to the three-dimensional midsole model is determined from the foot pressure data, or the region to be subjected to pressure relief is determined based on the analysis of the physical requirements of the target user, so as to determine the corresponding abnormal foot pressure region or the region to be subjected to pressure relief in the midsole model constructed in step S100.

In step S110, the three-dimensional midsole model is processed to delineate a boundary of a first foot preparation area. In some embodiments, at least one second foot preparation area is provided in the midsole, the second foot preparation area being located in a heel, a ball, or a socket portion of the midsole; the stress intensity of the topological structure or the lattice structure in the at least one second foot pressing pre-region is larger than that of the topological structure or the lattice structure outside the at least one second foot pressing pre-region.

In some examples, the second foot preparation region corresponds to a topology or lattice structure having a greater bulk density than a topology or lattice structure outside the second foot preparation region to correspond to a stronger solid structure. In some embodiments, the midsole first foot drying region is designed with weakened strength, and the second foot drying region with increased structural strength is arranged to balance the pressure distribution in order to realize the adjustment of the pressure distribution on the sole of the foot. In the three-dimensional data processing method for the midsole, the form of the basic unit of the lattice structure of the first foot drying pre-region or the second foot drying pre-region in the three-dimensional midsole model may be modified, for example, the rod diameter of the basic unit of the lattice structure of the first foot drying pre-region is reduced to reduce the volume density of the lattice structure of the first foot drying pre-region, so that the solid structure strength of the corresponding first foot drying pre-region is reduced; for another example, the rod diameter of the topology of the second foot press dry area is increased, so that the volume density of the topology of the first foot press dry area is reduced.

In some embodiments, the stress intensity of the lattice structure corresponding to the first foot drying pre-region and the second foot drying pre-region may be determined by at least one of a bulk density of the lattice structure, a lattice bulk structure, a printing material, a printing process, and a post-processing process, or the stress intensity of the topological structure of the first foot drying pre-region and the second foot drying pre-region may be determined by at least one of a bulk density of the topological structure, a printing material, a printing process, and a post-processing process.

In particular, the first and second foot drying zones may each determine a location to be provided in the midsole based on desired foot pressure data for a target user. In some embodiments, the area requiring sole pressure reduction, i.e., the first foot drying pre-region, is determined from the desired foot pressure data and the measured foot pressure data based on the sole protection requirement of the target user, and the intensity of the topological structure or the lattice structure is adjusted based on the range of the first foot drying pre-region and the pressure range corresponding to the region to determine that the rest of the pressure is dispersed outside the first foot drying pre-region.

In some embodiments, the desired foot pressure data is used to determine a foot pressure adjustment for the target user, and the second foot pressure pre-region is determined based on the need for pressure distribution, wherein the second foot pressure pre-region is determined based on the determined region available for sharing the sole pressure, for example, the lower pressure of the fossa lumbus under the natural state of the human body. The design strength of the topological structure or the lattice structure corresponding to the second foot pressing and drying area is increased, so that the pressure born by the second foot pressing and drying area is increased when the insole is worn, and the pressure of the sole outside the second foot pressing and drying area is naturally reduced.

Particularly, for the same target user, after a first foot drying pre-region is determined, the design is carried out, and the sole pressure born by the part outside the first foot drying pre-region is naturally increased; or, after the second foot drying pre-region is determined, the design is carried out, and the sole pressure born by the part outside the second foot drying pre-region is naturally reduced. That is, the effect of pressure adjustment can be achieved by determining the first foot drying pre-region or the second foot drying pre-region for design. Of course, the first foot drying pre-region and the second foot drying pre-region may be determined simultaneously based on the expected foot pressure data and the measured foot pressure data to define the region for bearing the dispersed pressure while determining the region to be subjected to pressure dispersion.

Based on the determined positions of the first foot pressure preparation region or/and the second foot pressure preparation region, the force strength of the topological structure or lattice structure in the at least one first foot pressure preparation region is weakened in step S120 so as to be smaller than the force strength of the topological structure or lattice structure outside the at least one first foot pressure preparation region.

In some embodiments, the method for processing three-dimensional data of a midsole further includes the step of enhancing the force strength of the topology or lattice structure in the at least one second foot preparation region to be greater than the force strength of the topology or lattice structure outside the at least one second foot preparation region.

Under the state of bearing external pressure, the topological structure or the lattice structure has elastic deformation capabilities of resisting stretching, torsion and shearing corresponding to different stress modes, and has certain strength. The intensity of the topological structure or the lattice structure in the first foot pressure drying area is smaller than that of the topological structure or the lattice structure outside the first foot pressure drying area, so that the effect of transferring the pressure of the first foot pressure drying area to other areas in a dispersed manner is achieved. In a specific embodiment, the correspondence between the strength of the topological structure or the lattice structure and the borne pressure, the shear force, and the like can be obtained based on a strength performance test on the topological structure or the lattice structure, where the test can be performed by detecting a topological structure entity or a lattice structure entity, or performing a simulation calculation by combining a stress-strain relationship with the performance of the material itself, or comparing the simulation calculation with a design detection result to quantify the structural strength and the bearable pressure.

The strength of the topological structure or the lattice structure can be represented by strength performance indexes such as tensile strength, compressive strength, shear strength, bending rigidity, torsional rigidity and toughness, for example, elastic deformation capacity, and the like, and in the shoe insole, the strength of the topological structure or the lattice structure is mainly used for ensuring that the shoe insole is in an elastic deformation state and the corresponding deformation amount is in a preset range under a wearing state (including a wearing state such as natural standing, walking, running and the like). The strength of the topological structure or the lattice structure is related to the structural form of the topological structure or the lattice structure and the manufacturing process, and in practice, the topological structure or the lattice structure which is suitable for the strength can be predetermined based on the strength design requirement of the insole.

In some examples, the bulk density of the lattice structure is related to the rod diameter thickness, lattice wall thickness, lattice size, density of the lattice rod body after molding; or the volume density of the topological structure is related to the thickness of the rod diameter of the topological structure and the density of the molded topological structure rod body.

The solid structure of the lattice structure is in the form of a connecting rod or a wall surface, the volume density of the lattice structure is related to the length, the diameter, the connection density, the wall thickness and the like of the connecting rod of the basic unit, and when the insole is filled with the material with uniform density, the volume density can represent the material usage amount in unit volume. Generally, when the connection form of the basic units of the lattice structure is determined, the stress strength of the lattice structure is positively correlated with the volume density thereof, for example, when the smaller the basic units of the lattice structure, i.e., the smaller the length of the connection rods, the greater the corresponding volume density, the greater the strength of the lattice structure of the midsole; or, when the diameter of the rod diameter of the connecting rod is larger, the corresponding volume density is larger, and the lattice structure of the insole has higher strength; for example, two lattice structures having different valences at the joint of the connecting rod and the node bar in the basic unit are generally different in volume density and structural strength from each other in accordance with lattice structure units having different connection methods.

In some embodiments, the lattice structure model is selected to be a different cell structure or basic cell geometry and bulk density in different regions of the midsole, but the variation in the bulk density of the midsole lattice structure is continuously variable in the midsole region to achieve that the midsole provides sufficient cushioning for the foot.

According to the corresponding relationship between the structural strength and the strength influencing factors such as the volume density, the printing material and the printing process of the topological structure or the lattice structure, the stress strength of the corresponding first foot drying pre-region or the second foot drying pre-region can be selected and adjusted according to the setting of the foot pressure distribution expected by the target user, for example, the volume density of the topological structure or the lattice structure such as the diameter and the length of the connecting rod, the connecting form such as the price and other structural parameters are adjusted. Specifically, the weakening of the first foot drying pre-region can be realized by reducing the volume density of the lattice structure, and the reduction of the volume density can be realized by increasing the length of a connecting rod of a basic unit or reducing the diameter of the connecting rod of the basic unit or reducing the wall thickness, or the connection form of the basic unit is changed, so that the connection degree between the nodes of the basic unit is reduced, namely, a sparse connection mode corresponding to low price is adopted, and the volume density of the lattice structure in the first foot drying pre-region is reduced; or, the volume density of the topological structure in the first foot pressing and drying area is reduced by reducing the node connection number or the rod diameter of the topological structure in the first foot pressing and drying area.

In some embodiments, the adjusting of the stress intensity of the first foot drying region in step S120 further includes setting a property of the topological structure in the first foot drying region in a different region or setting a property of the basic unit of the lattice structure, where the property is used to indicate at least one of a radiation intensity, a radiation duration, or a radiation frequency corresponding to the radiation control of the energy radiation device by the 3D printing apparatus control device, so that the radiation energy value received by the topological structure or the lattice structure of the first foot drying region in the model in the printing process is reduced. Specifically, a first foot pressing pre-region is marked in the shoe insole three-dimensional model, so that when subsequently formed shoe insole three-dimensional data slice data is used for printing by a 3D printing device, the attribute setting of the first foot pressing pre-region is read by a control device of the 3D printing device, the corresponding control device controls an energy radiation device of the printing device to print the foot pressing pre-region with lower energy, the material density of a topological structure or a lattice structure in the first foot pressing pre-region in the obtained shoe insole printing piece is lower, and the stress intensity of the topological structure or the lattice structure is smaller than that of the topological structure or the lattice structure outside the foot pressing pre-region.

And determining the adjustment of the volume density or the attribute in the corresponding area based on the weakened value of the stress intensity of the topological structure or the lattice structure in the first foot pressure pre-drying area or based on the strengthened value of the stress intensity of the topological structure or the lattice structure in the second foot pressure pre-drying area, wherein in certain embodiments, the stress intensity of the topological structure or the lattice structure in at least one first foot pressure pre-drying area or/and the second foot pressure pre-drying area is related to the expected foot pressure data obtained by calculation, the expected foot pressure data is less than the measured foot pressure data corresponding to the at least one first foot pressure pre-drying area, and the expected foot pressure data is greater than the measured foot pressure data corresponding to the at least one second foot pressure pre-drying area.

The expected foot pressure data is the expected human body foot pressure data corresponding to the insole of the application in a worn state, namely the foot pressure data adjusted by the insole. The foot pressure data, namely the pressure value corresponding to the foot pressure intervention area in the expected foot pressure data is smaller than the corresponding actual measurement pressure value of the human foot corresponding to the foot pressure intervention area under the state without insole adjustment. In one implementation, the measured foot pressure data (which is the unadjusted foot pressure data) in the same human body posture may be determined to set the corresponding expected foot pressure data, such as the foot pressure data of the target user on the plane in the natural standing state without leaning, the expected foot pressure data in the natural standing state is set based on the foot pressure data, and the expected foot pressure data value of the first foot drying prediction area is set to be smaller than the measured value of the corresponding foot area. In an application scenario, the first foot pressure pre-drying area may be an area where the foot is pressed greatly in a natural standing state, and is adapted to the requirements of comfort level and foot protection, and the expected foot pressure data value in the area is obtained by performing pressure dispersion adjustment on the corresponding area in the measured data, so that the expected foot pressure data of the first foot pressure pre-drying area is reduced.

Please continue to refer to fig. 5 and fig. 6, wherein fig. 5 is a simulation diagram of a measured human body test pressure distribution, and fig. 6 is a simulation diagram of a sole pressure distribution corresponding to the adjusted expected foot pressure data. The numerical value in each cell is expressed as the average pressure in the area, the corresponding plantar pressure distribution state can be obtained through the numerical values displayed in different areas of the plantar, the numerical values are determined by the actual or expected plantar pressure value and the selected pressure unit, and for the same plantar pressure distribution graph, the larger the numerical value is, the larger the average pressure in the corresponding unit area is. In the pressure distribution diagram, the size of each cell may be set based on selection, and is not limited by the actually measured foot pressure data density, for example, in the simulation diagram of the actually measured sole pressure distribution shown in fig. 5, the numerical value displayed in each cell may be a pressure value measured by 1 pressure sensor, or an average value of the measured values of 4 pressure sensors arranged in a square, and the range of each display cell may be set artificially based on the rule of displaying the foot pressure distribution; meanwhile, the numerical values in the foot pressure distribution diagram are different based on the selection of the foot pressure units, and different numerical values can be set and displayed based on different pressure units for the same foot pressure data.

Based on the foot pressure data of the target user in the natural state in fig. 5, the relative high pressure region and the low pressure region in the range of the sole of the foot of the target user are determined. As shown in fig. 5, in the non-adjusted state, the arch region of the human body corresponds to a smaller pressure value, such as the region where the pressure value is shown as 0 in the embodiment shown in fig. 6, in some practical situations, the arch region is not in contact with the pressure plate, i.e. the pressure value in this region is 0, such as the region where the pressure value is shown as 0 in the embodiment shown in fig. 3, and the relatively high pressure region is generally located at the ball part and the heel part (such as the region where the

numbers

70 or 76 are distributed in the embodiment shown in fig. 3). For a desired foot pressure profile such as that shown in fig. 6, it can be seen that the same regions of the sole of a foot correspond to different pressure values before and after adjustment, and that the pressure in the partial region in the region of the relatively high pressure can be selectively distributed to the low pressure region, thereby changing the pressure distribution of the sole of the foot in the natural state.

The medical intervention data is foot pressure distribution data for a desired or expected correction for the physical state of the target user. Obtained by physiological measures such as tendon reflex and pathological reflex, muscle strength and muscle tension, joint mobility, sensation (tactile/pain/proprioceptive), tenderness, swelling, skin condition (ulcer/color), and the like. The determination of the medical intervention data is related to a plurality of physiological health indexes and is used for relieving the symptoms of specific target users or reducing the risks of diseases of the target users, or the pressure state beneficial to foot maintenance is determined to be converted into preset medical intervention data based on medical data analysis. In one implementation, the region and value of the medical intervention data are determined according to the foot form data and the treatment plan measured by the foot form scanner, for example, for a target user with an ulcer area on the sole, the corresponding ulcer area has an expected pressure value range based on the requirements of foot protection and disease rehabilitation, the topological structure or lattice structure of the insole is designed according to the measured foot pressure data and the medical intervention data, and the expected pressure distribution and the wearing touch feeling of the target user are realized; if the target user with abnormal local pressure on the foot is in a state of uneven sole stress, the corresponding medical intervention data of the abnormal local pressure area is the pressure distribution data corresponding to the uneven sole stress reduction or elimination, the actually measured foot pressure data and the medical intervention data are referred to, the pressure transfer area of the first foot pressure pre-drying area, such as the second foot pressure pre-drying area and the transfer value, is determined, and the corresponding expected foot pressure data is obtained through calculation.

In some embodiments, in the process of weakening the stress intensity of the topology or lattice structure in the at least one first foot drying region or strengthening the stress intensity of the topology or lattice structure in the at least one second foot drying region in step S120, the stress intensity of the topology or lattice structure in the at least one first foot drying region or/and second foot drying region is related to the calculated desired foot pressure data and the measured foot shape profile data.

In some embodiments, in the process of weakening the stress intensity of the topology or lattice structure in the at least one first foot drying region or strengthening the stress intensity of the topology or lattice structure in the at least one second foot drying region in step S120, the stress intensity of the lattice structure in the at least one first foot drying region or/and second foot drying region is related to the desired foot pressure data obtained by calculation and the foot shape profile data obtained by measurement, and the gait data.

Meanwhile, the gait data is related to the physical functions of the target user, for example, elderly people generally have lower walking speeds and smaller strides, and the time for the sole to stand while being supported by both feet in walking becomes longer. The strength of the lattice structure is related to the touch of a human body in wearing, the strength index of the topological structure or the lattice structure comprises rigidity or hardness, and in gait data analysis, the topological structure or the lattice strength of a target user with a longer support period of the feet can be set to have higher toughness and lower hardness.

In certain embodiments, medical intervention data is determined based on an analysis of the gait data. And comparing clinical examination data of medical measurement with experimental analysis of gait data, comprehensively evaluating the symptoms of the target user, and determining medical intervention data set for the target user based on quantitative and standardized inference. The expected foot pressure data, the gait data and the foot shape outline data provide conditions and limits for pressure distribution modes, and different pressure distribution schemes are combined to compare and obtain the most preferable mode so as to design the strength of a topological structure or a lattice structure.

In step S130, the stress intensity of the topology or the lattice structure inside the at least one first foot pressing pre-region and the stress intensity of the topology or the lattice structure outside the first foot pressing pre-region are processed, so that the change of the stress intensity of the topology or the lattice structure outside the first foot pressing pre-region toward the stress intensity of the topology or the lattice structure extending inside the at least one first foot pressing pre-region is in gradual transition.

In some embodiments, the gradual transition includes a gradual change of the lattice body structure, such as a gradual change of the size of a basic unit of the lattice structure, a gradual change of the density of the basic unit, a gradual change of the thickness of a wall surface of the lattice, a gradual change of the length of a rod diameter of the lattice, a gradual change of the thickness of a rod diameter of the lattice, a continuous gradual change of the geometrical structure (such as the geometrical structure type) of the basic unit of the lattice structure, and a gradual change of the performance of the lattice structure formed by a post-processing process or a printing process, such as a gradual change of the density of the lattice structure after molding, and a gradual change of the material of the lattice structure; or, the gradual transition is structural gradual change of the topological structure, for example, the gradual change of the rod diameter of the connecting rod body in the topological structure, the gradual change of the volume formed by gradual change of the connection mode between the rod diameters of the topological structure, or the gradual change of the density of the material of the topological structure formed by the manufacturing process and the post-treatment process.

Here, the topological structure or the lattice structure of the midsole model may be processed in three-dimensional data processing to form a lattice structure strength gradient or a topological structure strength gradient; or, the determined first foot drying pre-region can be used for carrying out attribute setting on the topological structure or the lattice structure which is positioned outside the first foot drying pre-region and extends towards the inside of the at least one first foot drying pre-region so as to indicate the printing parameters of the region in manufacturing, such as printing, for example, the radiation density of the printing energy of the region corresponding to the direction extending towards the first foot drying pre-region outside the first foot drying pre-region is gradually increased or gradually reduced, so that the gradual transition of the stress intensity is formed; or marking the topological structure or the lattice structure area which is positioned outside the first foot pressure drying area and extends towards the inside of the at least one first foot pressure drying area through the determined first foot pressure drying area so as to indicate the post-processing process.

The unit area, the pressure variation value and the preset value can be set manually, or determined based on medical intervention data of a target user, for example, a pressure peak value suitable for sole maintenance or a pressure variation value of different areas are determined, and after a first foot drying pre-area is determined, lattice structures located outside the first foot drying pre-area are gradually transited towards lattice structures extending in the at least one first foot drying pre-area so as to reduce the pressure peak value outside the first foot drying pre-area or reduce pressure abrupt change of a junction area; furthermore, the pressure change state suitable for the cushioning of the sole can be determined through the manufacturing process (standard) of the footwear, for example, to enhance the cushioning function of the midsole or the impact resistance, wear resistance and the like of the midsole.

In some embodiments, the gradual transition of the change in the force strength of the lattice structure outside the first foot preparation region towards the force strength of the lattice structure extending within the at least one first foot preparation region is achieved by setting at least one of a bulk density of the lattice structure, a lattice bulk structure, a printing material, a printing process, and a post-treatment process in the three-dimensional midsole model; or, the gradual transition of the topology outside the first foot preparation area towards the topology extending inside the at least one first foot preparation area is achieved by determining at least one of a bulk density of the topology, a printing material, a printing process, and a post-treatment process.

In some examples, the bulk density of the lattice structure is related to the rod diameter thickness, lattice wall thickness, lattice size, density of the lattice rod body after molding; and the volume density of the topological structure is related to the thickness of the rod diameter of the topological structure and the density of the molded topological structure rod body.

With continued reference to fig. 2a and 2b, fig. 2a is a schematic diagram of a partial region of the three-dimensional midsole model in one embodiment, and fig. 2b is a side view of a partial region of the lattice structure of the midsole model. As shown, after at least one first foot preparation region of the midsole model is determined, the rod diameters of the lattice structure basic units extending toward the first foot preparation region of the lattice structure outside the first foot preparation region are gradually reduced (in the X direction of the following arrow in fig. 2a and 2 b), and correspondingly, the volume density of the lattice structure is gradually reduced from the outside of the first foot preparation region to the inside of the first foot preparation region, so that the strength of the lattice structure outside the first foot preparation region is gradually reduced toward the strength of the lattice structure extending toward the first foot preparation region. In one embodiment, the rod diameters of the basic units of the lattice structure extending from the lattice structure outside the first foot drying region to the first foot drying region are gradually reduced, so that the lattice structure as a whole has no shape transition.

Please continue to refer to fig. 2c and fig. 2d, which are a schematic three-dimensional view and a schematic plan view of a lattice structure in which the basic units in the midsole model adopt another geometric structure, as shown in the figure, the basic units in the midsole are hexagonal-like holes, the lattice structure entity corresponds to the connecting rod as the side length of the hexagon, and the volume density of the lattice structure extending from the lattice structure outside the first foot drying pre-region to the first foot drying pre-region is gradually reduced; in one implementation, such as the illustrated embodiment, the rod diameters of the lattice structure base units are tapered in a direction extending toward the first foot press dry region (in the X direction following the arrows in fig. 2c, 2 d).

The lattice structure outside the first foot pressing and drying pre-region is in gradual transition towards the lattice structure extending into the at least one first foot pressing and drying pre-region, and the gradual transition can also be realized by setting the size of the basic unit, for example, the length of the rod diameter of the lattice structure outside the first foot pressing and drying pre-region towards the lattice structure basic unit of the first foot pressing and drying pre-region is gradually increased, the volume density of the corresponding lattice structure basic unit is gradually reduced, and the stress intensity is gradually reduced.

In other implementations, when the lattice structure basic unit is in the form of a planar body, the thickness of the wall of the lattice structure basic unit, which is located outside the first foot pressing pre-region and extends toward the first foot pressing pre-region, may be changed, for example, the thickness of the wall of the lattice structure basic unit, which is located outside the first foot pressing pre-region, is set to gradually decrease along the extending direction, for example, to continuously decrease linearly.

In still other implementations, the gradual transition of the lattice structure extending from the lattice structure outside the first foot drying pre-region toward the first foot drying pre-region may be determined based on the specific type of the lattice structure, for example, when the lattice structure is a planar body in which pores exist between different basic units, the gradual transition of the lattice structure may be achieved by gradually increasing the size of the pores and gradually decreasing the volume density of the corresponding basic units of the lattice structure in a direction toward the first foot drying pre-region. The lattice structure alternatives and the manner in which the graded transition is achieved are not limiting of the illustrated embodiments.

Here, it should be understood that, the topology or the lattice structure outside the first foot drying pre-region is in gradual transition towards the topology or the lattice structure extending into the at least one first foot drying pre-region, and by determining the boundary region and making the strength of the topology or the lattice structure corresponding to the boundary region in gradual transition, that is, the pressure distribution in the boundary region in gradual transition, based on the method for determining the stress strength of the midsole topology or the lattice structure provided by the present application, the topology or the lattice structure outside the first foot drying pre-region can be in gradual transition towards the topology or the lattice structure extending into the at least one first foot drying pre-region by setting at least one influence factor of the stress strength in the manufacturing (including the post-treatment process) of the midsole.

In one embodiment, the gradual transition may also be achieved by a change in the printing material, for example, by using printing materials of different hardness, so that the printed lattice structures of the printing materials of different hardness have different strengths, thereby achieving a gradual transition of the topology or lattice structures located outside the first foot drying region and extending toward the first foot drying region by the gradual change in the hardness of the printing materials.

In a further embodiment, the gradual transition may also be achieved by a printing process, for example, the midsole is manufactured by a 3D printing process, and the topology or the lattice structure outside the first foot drying region is gradually changed toward the topology or the lattice structure extending into the at least one first foot drying region in response to the received energy density during the radiation forming process, for example, the energy density is gradually reduced in accordance with the extending direction, so that the strength of the solidified topology or the lattice structure is gradually reduced.

In some embodiments, the three-dimensional data processing method further includes a step of processing the stress intensity of the topological structure or the lattice structure inside the at least one second foot pressure intervention region and the stress intensity of the topological structure or the lattice structure outside the second foot pressure intervention region, so that the stress intensity of the topological structure or the lattice structure outside the second foot pressure intervention region is in gradual transition towards the change of the stress intensity of the topological structure or the lattice structure extending inside the at least one second foot pressure intervention region.

In another embodiment, the gradual transition may also be achieved by a post-treatment process, for example, by removing a part of the rods of the lattice structure to change the strength of the lattice structure, or by removing a part of the rods of the lattice structure to reduce the number of node connections to change the strength of the lattice structure; for example, in the shoe midsole manufactured based on the 3D printing process, after the printed shoe midsole is subjected to a post-curing step of 3D printing, the topological structure or the lattice structure outside the first foot drying region and extending towards the inside of the at least one first foot drying region is irradiated by light sources with different intensities, and the like.

In some examples, the gradual transition of the change in the force strength of the topology or lattice structure outside the second foot preparation region towards the force strength of the topology or lattice structure extending within the at least one second foot preparation region is achieved by providing a determinant of the force strength of the topology or lattice structure in the three-dimensional midsole model, such as at least one of the bulk density of the lattice structure, the bulk structure of the lattice structure, the bulk density of the topology, the printing material, the printing process, and the post-processing process.

In some examples, the bulk density of the lattice structure is related to the rod diameter thickness, the lattice wall thickness, the lattice size, and the density of the lattice rod after molding; and the volume density of the topological structure is related to the thickness of the rod diameter of the topological structure, the thickness of the wall surface and the density of the rod body or the surface body of the formed topological structure.

With continued reference to fig. 4a and 4b, a schematic perspective view and a schematic plan view of a lattice structure of a three-dimensional midsole model according to an embodiment are shown, respectively. As shown in the figure, the basic units of the lattice structure adopt a rod diameter connection form, wherein the basic units gradually increase or become thicker along the X direction conforming to the arrow direction, wherein the X direction corresponds to the direction extending from the outer part of the second foot pressing and drying pre-region of the insole to the second foot pressing and drying pre-region, and based on the arrangement of the basic units of the lattice structure, the stress intensity of the lattice structure positioned outside the second foot pressing and drying pre-region towards the lattice structure positioned in the at least one second foot pressing and drying pre-region gradually increases, and the borne sole pressure gradually increases.

In some embodiments, after the processing in step S130 is completed, it is determined that the stress intensity of the lattice structure outside the first foot preparation region gradually changes toward the stress intensity of the topology or lattice structure extending inside the at least one first foot preparation region, or it is determined that the stress intensity of the topology or lattice structure outside the second foot preparation region gradually changes toward the stress intensity of the topology or lattice structure extending inside the at least one second foot preparation region, and the three-dimensional data processing method further includes a step of generating the topology or lattice structure to fill the contour of the three-dimensional midsole model. Here, the topological structure or the lattice structure may be generated based on preset parameters such as positions of the first foot pressing pre-region and the second foot pressing pre-region, structural forms of the topological structure or the lattice structure preset in different regions, rod diameter size, rod length, gradual transition form, and distortion of the lattice structure in different regions.

In some embodiments, the step of creating a topology or lattice structure for filling the midsole model may be further included after weakening the first foot drying zone or strengthening the second foot drying zone in step S120. That is, in an actual scenario, the step of filling the topology or lattice structure into the three-dimensional midsole model contour may be performed in any one of steps S100, S110, S120, and S130, that is, the midsole model formed by the topology or lattice structure corresponding to the desired foot pressure distribution may be formed before generating the slice data.

It will be readily appreciated that the topology or lattice structure in combination with the three-dimensional profile of the midsole determines the desired foot pressure data for the midsole entity obtained from the midsole model. Generally, the force intensity of the topological structure or the lattice structure is determined by at least one of a material, a bulk density, a printing process, and a post-processing process, and the force intensity can be changed by changing the bulk density of the topological structure or the lattice structure during the process of filling the contour of the midsole of the shoe with the topological structure or the lattice structure to obtain a desired foot pressure distribution.

In one implementation, after determining the three-dimensional contour of the midsole model, the height of the raised portion of the lumbar and the first foot drying pre-region or/and the second foot drying pre-region, weakening the strength of the first foot drying pre-region or/and strengthening the strength of the second foot drying pre-region to determine the stress strength of different regions in the midsole model, and generating a topological structure or a lattice structure to fill the midsole model based on the function relationship between the volume density and the strength of the topological structure or the lattice structure.

Still alternatively, in some embodiments, the midsole is modeled using a pre-set topology or lattice structure in S100, and then the topology or lattice structure is adjusted accordingly based on the adjustment of the midsole profile and the intensity settings of the different regions in S110, S120, S130.

In some embodiments, the three-dimensional data processing method for the midsole of the footwear article includes a step of determining the height of the raised portion of the waist socket portion and the force intensity thereof.

In some embodiments, the height of the raised portion of the waist socket portion and the force intensity thereof are correlated with the calculated foot pressure data and foot shape profile data and gait data of the target user. And the walking habit preference and the physical state of the target user represented by the gait data are combined with expected pressure data and foot shape profiles obtained through calculation to determine the strength design of a topological structure or a lattice structure of the fossa by the pressure actually born by the arch part so as to determine the height of the fossa uplifting part and the adjustment value of the stress strength, namely the strengthening value.

In some embodiments, the contour curve of the waist socket portion and the arch contour curve of the foot show an incomplete fit state based on the sole state of the target user, for example, when there is an injury such as a lacerated plantar fascia in the arch region of the target user, the injured region of the lacerated fascia in the expected foot pressure data corresponds to a smaller pressure value, and when the pressure peak value of the high-pressure plantar region is reduced by increasing the sole contact surface, the contour design of the waist socket portion is adjusted to the incomplete fit state based on the arch contour curve of the target user, so that the pressure of the arch region close to the injured part of the fascia is reduced.

Generally, the function of the midsole in footwear is to absorb shock and cushion, such as absorbing shock and shape rebound during movement, and the thickness of the midsole is related to the shock absorbing function and also determines the feel of the intended user in wearing, such as hardness. The midsole exhibits a non-uniform thickness for accommodating the needs for pressure matching of the target user's foot, while the thickness value is determined with reference to the target user's physical state.

In some embodiments, the three-dimensional data processing method further comprises the step of adjusting the preset thickness of the three-dimensional midsole model according to at least one of the measured body data, weight data, foot shape profile data, gait data, or foot pressure data of the target user.

Specifically, the thickness of the midsole affects the overall elastic deformation tendency and the sole pressure distribution of a target user when the insole is worn, and the preset thickness can change the stress state of the target user, so that each mechanical parameter of the preset thickness and the stress of the target user is related to the touch of the corresponding target user.

In particular, in a specific implementation manner, the step of determining the raised height of the waist socket portion and the force intensity may be performed at different times, for example, after the model contour area of the three-dimensional midsole is determined in step S100, at least one first foot drying pre-area or/and second foot drying pre-area is determined based on the foot pressure data and the foot shape contour data of the target user, and then the raised height of the waist socket portion is determined to match the foot shape contour of the target user, or alternatively, the raised height of the waist socket portion of the target user may be determined first and then at least one first foot drying pre-area or/and second foot drying pre-area is determined; or, after the stress intensity of the topological structure or the lattice structure inside the at least one first foot pressing pre-region and the stress intensity of the topological structure or the lattice structure outside the first foot pressing pre-region are processed to make the stress intensity of the topological structure or the lattice structure outside the first foot pressing pre-region gradually transition towards the change of the stress intensity of the topological structure or the lattice structure extending inside the at least one first foot pressing pre-region, the rising height and the stress intensity of the waist socket part are determined.

In some embodiments, the three-dimensional data processing method further comprises the step of constructing a cushioning layer model on a top surface of the three-dimensional midsole model. In one example, the buffer layer model is constructed using a topology or using a plurality of elementary cells that are lattice structures. The buffer layer corresponding to the buffer layer model is arranged on the surface of the insole model and used for providing enough buffer force for a user in the wearing process.

In some embodiments, the buffer layer model is composed of a lattice structure readable by a 3D printing device, such as the buffer layer model is composed of a pre-set base unit in the form of a lattice structure of the midsole. The rod diameter or the wall thickness of the lattice structure in the buffer layer model is smaller than that of the lattice structure in the three-dimensional insole model, and the lattice volume of the lattice structure in the buffer layer model is smaller than that of the lattice structure in the three-dimensional insole model. The buffer layer with the shoes insole prints integrated into one piece through 3D, distinguishes shoes insole and buffer layer with the different functions that correspond based on different designs of lattice structure. The diameter or the wall thickness of the basic unit connecting rod of the lattice structure is related to the strength of the lattice structure, the buffer layer model adopts a small rod diameter or thin wall structure and is designed to be composed of small-volume lattice basic units, the hardness of the buffer layer is reduced through the connection of the small rod diameter or thin wall basic units while the strength of the buffer layer is ensured, a layer of buffer structure with low hardness, good elastic performance and soft touch feeling is formed on the surface of the insole, and the pressure impact of the contact of the sole and the insole is further weakened.

In some embodiments, the cushioning layer model consists of a topology readable by a 3D printing device, the rod diameter of the topology in the cushioning layer being smaller than the rod diameter in the midsole topology; or the number of the node connections of the topological structure in the buffer layer model is smaller than that of the node connections in the midsole topological structure, so that the hardness of the buffer layer is reduced, the buffer layer is easy to elastically deform, and the buffer function is realized.

The contour of the buffer layer model can conform to the contour of the upper surface of the three-dimensional insole model, and the upper surface of the three-dimensional insole model is attached to the contour of the upper surface of the three-dimensional insole model in actual printing to form an integrated structure through printing. The cushioning layer pattern may be designed to be of uniform or non-uniform thickness, typically much less than the midsole thickness, to conform to the contour of the midsole. The outer contour of the cushioning layer model may be based on the contour of the midsole, for example, by designing the outer contour of the lower surface of the cushioning layer model to be the same as the outer contour of the upper surface of the midsole, resulting in a natural connection without abrupt changes on the midsole.

In some embodiments, the profile design, topology, or lattice structure design of the buffer layer model is further correlated to the desired foot pressure data, gait data, foot profile, etc. of the target user, e.g., the buffer layer upper surface profile can conform to the target user foot profile design. In actual walking, the insole deforms along with the buffer layer, impact on the sole is absorbed through the buffer layer, and then the insole provides supporting force for the sole, namely, the adjusted pressure is distributed.

In some embodiments, the three-dimensional data processing method further comprises the step of building a top-fit model on a top surface of the three-dimensional midsole model. The upper binding face corresponding to the upper binding face model is used for binding the vamp and providing a sticky contact surface for the connection of the vamp and the sole, and the vamp is used for forming a covering surface surrounding the foot of the target user with the insole. In one implementation, the upper attachment surface may be designed as a ring-shaped structure for providing a ring-shaped contact surface for bonding the upper to the midsole, the outer contour of which is obtained following the contour of the midsole.

In some embodiments, the upper attaching surface model is a non-hollow filling structure having continuous upper and lower surfaces to achieve better adhesion effect of the corresponding entity. And the upper surface and the lower surface of the obtained upper binding surface are respectively bonded with the vamp and the middle sole, and the bonded adhesive comprises neoprene adhesive, polyurethane adhesive, SBS adhesive and the like.

In some embodiments, the three-dimensional data processing method further comprises the step of constructing a cushioning layer model between the three-dimensional midsole model and the upper fitted surface model. That is, a buffer layer model adopting a lattice structure is arranged on the three-dimensional midsole model, and an upper attaching face model is constructed on the buffer layer model. In one example, the buffer layer model is constructed using a plurality of elementary cells that are lattice structures. In another example, the buffer layer model is constructed using a topology.

In some embodiments, the three-dimensional data processing method further includes the step of constructing a lower veneering model on a bottom surface of the three-dimensional midsole model, the lower veneering being used to join the outsole. The outsole, i.e., the portion of the sole beneath the midsole that is intended to directly contact the ground, is generally contoured on the lower surface to increase friction and is made of a wear-resistant material such as natural rubber, synthetic rubber, elastomers, thermoplastic elastomers (TPEs), foams, gels, combinations thereof, and the like. The lower attaching surface is used for providing a contact surface for bonding the insole and the outsole, and the bonding agent for realizing bonding comprises neoprene adhesive, polyurethane adhesive, SBS adhesive and the like.

In some embodiments, the lower attaching surface model is a non-hollow filling structure having continuous upper and lower surfaces to achieve better adhesion effect of the corresponding entity.

In some embodiments, the lower conforming surface model is in an annular configuration along a bottom contour of the three-dimensional midsole model. The outer contour of the lower attaching surface model conforms to the outer contour of the lower surface of the three-dimensional insole model, the annular structure is adopted to reduce the weight of the sole of the corresponding entity, and the insole and the outsole are bonded on the upper contact surface and the lower contact surface of the annular structure.

It should be understood that, since the raised height of the waist socket portion in the midsole model, the determined positions and structural strengths of the first foot drying pre-region and the second foot drying pre-region all affect the pressure distribution of the final midsole entity in the worn state, the data processing processes executed by steps S110, S120, and S130 in the three-dimensional data processing method provided by the present application are not limited to the embodiment shown in fig. 9, and after the adjustment performed in any step, the data processing processes may be shifted to the remaining steps for adjustment, that is, S110, S120, and S130 may be repeatedly performed before the three-dimensional data slice is formed to ensure that the corresponding pressure distribution of the formed midsole entity in the worn state approaches the expected pressure data, and the process of the cycle adjustment is not limited to the illustrated sequence, for example, the foot drying pre-region may be determined and the topological structure or the lattice structure strength may be strengthened or weakened in the step S110 and S120, then, the step of adjusting the height of the raised waist pit is carried out.

While fig. 11 shows an example of a method for processing three-dimensional data of a midsole as provided herein, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order.

In step S140, midsole three-dimensional slice data readable for the 3D printing device is formed.

The 3D printing device includes a 3D printing device employing filament melt extrusion, material droplet ejection, powder lay-up melting, binder ejection, or photosensitive resin laminate curing, for example: an SLS device, an EBM device, an MJF device, a CLIP device, an SLA device, or a DLP device. And the 3D printing equipment projects an image corresponding to the topological structure or the lattice structure and the radiation energy density distribution of the image determined by the structural strength based on the read three-dimensional slice data and the energy radiation device under the control of the control device, and prints the material to be solidified into the entity of the insole in a preset three-dimensional structure and strength.

Before the 3D printing device executes the printing process, the pre-processing needs to generate the layered data of the printing target object, and the three-dimensional data slice includes the complete layered processing method of the printing target object, i.e. the shoe midsole processed in steps S110 to S130, such as the layer height configured for each layer and the layered (slice) pattern of each layer. The layered (sliced) pattern is obtained by performing cross-sectional division in the Z-axis direction (i.e., in the height direction) based on the three-dimensional midsole model in advance. And forming a slice pattern outlined by the outline of the three-dimensional midsole model on the cross-section layer formed by each adjacent cross-section division, wherein the contour lines of the upper cross-section surface and the lower cross-section surface of the cross-section layer can be determined to be consistent under the condition that the cross-section layer is thin enough. For a 3D printing device based on surface projection, each slice pattern needs to be described as a layered image. For a 3D printing device based on scanning illumination, each slice pattern is described by coordinate data on the scanning path.

In some embodiments, the three-dimensional slice data further includes a property of each slice, such as a slice for the foot drying pre-region, and the three-dimensional slice data includes a slice property for indicating a printing process, and the property is used for indicating at least one of a radiation intensity, a radiation duration or a frequency of radiation control of the energy radiation device corresponding to the 3D printing apparatus control device, so that the radiation energy value correspondingly received by the foot drying pre-region in the model in printing is reduced, and the foot drying pre-region corresponding to the lower material density is obtained.

In certain embodiments, the topology or lattice material may also be polypropylene, Acrylonitrile Butadiene Styrene (ABS), Polycarbonate (PC), PC-ABS, PLA, polystyrene, lignin, polyamide foam, polyamide with additives such as glass or metal particles, methyl methacrylate-acrylonitrile-butadiene-styrene copolymer, absorbable materials such as polymer-ceramic composites, and other similar materials suitable for midsole fabrication, without limitation to the above examples.

The application also discloses a 3D printing method applied to the 3D printing equipment, and the 3D printing equipment comprises: an energy radiation device for radiating energy to a printing surface, and a component platform for carrying a three-dimensional object cured by the energy radiation.

The 3D printing device includes a 3D printing device employing filament melt extrusion, material droplet ejection, powder lay-up melting, binder ejection, or photosensitive resin laminate curing, for example: an SLS device, an EBM device, an MJF device, a CLIP device, an SLA device, or a DLP device.

For convenience of illustration and description, in the embodiments of the present application, the 3D printing method is described by taking a DLP device, an SLA device and an SLS device as examples, but the application of the 3D printing method to different 3D printing devices is not limited thereto.

The energy radiation device is an energy radiation device based on surface projection or an energy radiation device based on scanning radiation. In a common 3D printing apparatus, such as a DLP (Digital Light processing) apparatus based on bottom exposure, an energy radiation device is a projection device based on surface projection, and includes a DMD chip, a controller, a storage module, and the like. Wherein the storage module stores a layered image for layering a 3D object model. And the DMD chip irradiates the light source of each pixel on the corresponding layered image to the bottom surface of the container after receiving the control signal of the controller. In fact, the mirror is composed of hundreds of thousands or even millions of micromirrors, each micromirror represents a pixel, and the projected image is composed of these pixels. The DMD chip may be simply described as a semiconductor light switch and a micromirror plate corresponding to the pixel points, and the controller allows/prohibits the light reflected from each of the micromirrors by controlling each of the light switches in the DMD chip, thereby irradiating the corresponding layered image onto the photo-curable material through the transparent bottom of the container so that the photo-curable material corresponding to the shape of the image is cured to obtain the patterned cured layer.

In another or conventional SLA (Stereo stereolithography) Apparatus, for bottom exposure or top exposure, the energy radiation device is a scanning radiation-based energy radiation device, and includes a laser emitter, a lens group located on an outgoing light path of the laser emitter, a vibrating lens group located on an outgoing light side of the lens group, and a motor for controlling the vibrating lens, and the like, wherein the laser emitter is controlled to adjust energy of an output laser beam, for example, the laser emitter is controlled to emit a laser beam with a preset power and stop emitting the laser beam, and further, the laser emitter is controlled to increase power of the laser beam and decrease power of the laser beam. The lens group is used for adjusting the focusing position of the laser beam, the galvanometer group is used for controllably scanning the laser beam in a two-dimensional space on the bottom surface or the top surface of the container, the photocuring material scanned by the laser beam is solidified into a corresponding pattern solidified layer, and the swing amplitude of the galvanometer group determines the scanning size of the SLA equipment.

Conventionally, in a bottom exposure apparatus (such as a DLP or LCD apparatus), the member stage is suspended above a printing reference surface, and in a top exposure apparatus (such as a DLP or SLA apparatus), the member stage is suspended below the printing reference surface (generally referred to as a liquid surface of a resin bath) for attaching and accumulating a radiation-cured pattern cured layer. Typically, the material of the component platform is different from the photocurable material. The component platform is driven by a Z-axis driving mechanism in the 3D printing equipment to move along the Z-axis (vertical) direction so that the material to be solidified is filled between the component platform and the printing reference surface, so that an energy radiation system in the 3D printing equipment can irradiate the material to be solidified through energy radiation, and the irradiated material is solidified and accumulated and attached to the component platform. In order to accurately control the irradiation energy of each cured layer, the component platform and the attached 3D object part to be manufactured are moved to a position where the minimum distance between the component platform and the printing reference surface is equal to the layer thickness of the cured layer to be cured, and the component platform is driven by the Z-axis driving mechanism to ascend so as to separate the cured layer from the bottom of the container.

For SLS (Selective Laser Sintering) equipment, the energy radiation device comprises a Laser emitter, a flat field focusing lens and a vibrating mirror system, and the Laser emitter and the vibrating mirror system are controlled to adjust the energy of the output Laser beam, for example, the Laser emitter is controlled to emit a Laser beam with a preset power and stop emitting the Laser beam, and for example, the Laser emitter is controlled to increase the power of the Laser beam and decrease the power of the Laser beam. The flat field focusing lens is used for adjusting the focusing position of the laser beam, the galvanometer system is used for controllably scanning the laser beam in a two-dimensional space of a printing reference surface in the container, and the light-cured material scanned by the laser beam is cured into a corresponding pattern cured layer.

The component platform of the SLS device is arranged in a powder bed or a sintering forming chamber for containing materials to be solidified and is used for attaching and accumulating the irradiated and solidified pattern layers. After powder bed powder laying is finished, heating a powder material to be solidified to a certain temperature just lower than a powder sintering point through a constant temperature facility in a printing device, tracking a three-dimensional model slice of a printing component by laser of an energy radiation device, copying the slice on the powder bed in a corresponding image, heating the powder material to a temperature higher than the melting point under laser irradiation to realize sintering, realizing solidification in a height corresponding to the slice, descending the powder bed after one layer is built, starting to build a corresponding next slice pattern on the existing solidified layer, and repeating the process until printing is finished.

Please refer to fig. 12, which is a flowchart illustrating a 3D printing method according to an embodiment of the present application.

In step S200, three-dimensional midsole slice data, that is, three-dimensional midsole slice data processed in the method for processing three-dimensional midsole data for an article of footwear according to any one of the embodiments shown in fig. 11, is read. The three-dimensional slice data includes slice layered images and corresponding layer heights. In the layering process of the three-dimensional insole model by the layering equipment, the three-dimensional insole model is divided in a transverse mode along the Z-axis direction (namely along the height direction). And under the condition that the cross section layer is thin enough, the contour lines of the upper cross section surface and the lower cross section surface of the cross section layer are considered to be consistent, namely the contour lines of the cross section layer form a layered image.

In some embodiments, the three-dimensional slice data further includes a property of each slice, such as a slice for the foot drying pre-region, and the three-dimensional slice data includes a slice property for indicating a printing process, and the property is used for indicating at least one of a radiation intensity, a radiation duration or a frequency of radiation control of the energy radiation device by the control device corresponding to the 3D printing apparatus, so that a radiation energy value correspondingly received by the foot drying pre-region in the model during printing is reduced, and a foot drying pre-region corresponding to a lower material density is obtained.

Adjusting the spacing between the component platform and the printing surface in step S210 to fill the printing surface with a material to be cured; wherein the thickness of the filled material to be solidified corresponds to the slice layer height of the three-dimensional slice data of the insole.

And adjusting the distance between the component platform and the printing surface based on the slice layer height of the three-dimensional midsole model in the three-dimensional slice data, so that the material to be solidified in the container flows and is filled into the gap in the distance, or the light-solidified material is added into the gap by a filling device so as to fill the material to be solidified in the printing surface, wherein the distance, namely the layer thickness forming the layer to be printed, is set corresponding to the slice layer thickness in the slice. The printing surface, i.e. the surface of the corresponding energy radiation system that is in contact with the resin, i.e. the bottom surface in a container containing the material to be photocured in a DLP apparatus for bottom surface exposure, conforms to the direction of projection.

In step S220, energy is radiated to the filled material to be cured based on the midsole three-dimensional slice data to obtain a corresponding pattern cured layer.

According to the mask pattern of the layered image, the control device controls the Z-axis driving mechanism and the energy radiation system to cure the photocured layer by layer during printing. The control device sends the layered images to the energy radiation system one by one according to a preset printing sequence, the energy radiation system irradiates the images to the transparent bottom or the top of the container, and the irradiated energy solidifies the light-cured material at the bottom of the container into a corresponding pattern cured layer.

In the 3D printing apparatus based on surface exposure, the energy radiation device is a projection device. And determining the compensated controlled parameters based on the initial corresponding relation between the light radiation intensity and the controlled parameters when the projection device is in the initial state and the corresponding relation between the detected light radiation intensity and the controlled parameters after attenuation, and controlling the projection device according to the determined controlled parameters. Wherein the controlled parameters refer to parameters capable of changing the optical radiation and/or illumination duration output by the projection device, and include, but are not limited to: and the slice data are converted into controlled parameters and solidified based on the relation between the determined layered image and the controlled parameters so as to obtain the corresponding pattern solidified layer pattern.

Specifically, the step of controlling the energy radiation device to perform the curing includes: and controlling at least one of the radiation duration, the light intensity and the irradiation times of the energy radiation device, and presetting a corresponding relation between the layer thickness and the energy or the gray level of the irradiated image according to the type of the energy device. For example, the energy radiation device comprises a laser emitter, and the output power of the laser emitter is controlled according to the corresponding relation between the layer thickness and the energy. For another example, the energy radiation device includes a light source array and a DMD chip, and the gray scale of each light source illuminating an image in the light source array is controlled according to the correspondence between the layer thickness and the gray scale. In a specific implementation manner, a corresponding relationship between the layer thickness and the irradiation duration, or a corresponding relationship between the layer thickness and the energy and the irradiation duration, or a corresponding relationship between the layer thickness and the gray scale and the irradiation duration may also be preset, and the irradiation image of the energy radiation device may be controlled according to the layer thickness of the current layer. Here, the correspondence includes, but is not limited to: mapping with a look-up table, or pre-constructing an adjustment function, etc.

In step S230, a pattern cured layer is accumulated on the member platform to form a midsole for an article of footwear corresponding to the three-dimensional midsole model.

In the 3D printing apparatus based on bottom surface exposure, the printing reference surface is disposed at the bottom of the container, and the pattern cured layer cured in step S220 is respectively attached between the bottom of the container and the component platform or a previous cured layer.

In the top-surface exposure based 3D printing apparatus, a printing reference surface is provided on an upper surface of the material to be cured, i.e., a contact surface with air. After the solidification of one deck is accomplished, the solidified layer that adheres to on the component platform descends under the drive of Z axle actuating mechanism, and the preset height that forms between component platform descending distance and the material surface of waiting to solidify is the thickness that next layering image corresponds, forms new layer of waiting to print after being filled between this solidified layer upper surface and the printing face.

In step S240, determining whether the three-dimensional midsole model is printed, and if not, successively executing S210, S220, and S230; if yes, the process is ended. By performing the above steps, through a plurality of filling, irradiating and separating operations, the solidified layers are accumulated on the component platform to obtain a solid structure corresponding to the three-dimensional midsole model.

Fig. 11 is a simplified schematic structural diagram of a computer device according to an embodiment of the present disclosure. As shown in fig. 11, the computer apparatus includes a storage device 30 and a processing device 31.

The memory device 30 is configured to store at least one program, and a three-dimensional midsole model. The storage device 30 includes a non-volatile memory and a system bus. The nonvolatile memory is, for example, a solid state disk or a usb disk. The system bus is used to connect the non-volatile memory with the CPU, where the CPU may be integrated in the storage device 30 or packaged separately from the storage device 30 and connected to the non-volatile memory through the system bus.

The processing device 31 is connected to the storage device 30 and is configured to execute at least one program to coordinate the storage device 30 to execute the three-dimensional data processing method of any one of the embodiments shown in fig. 11-12 provided in the present application on the three-dimensional midsole model.

The present application also provides a computer readable storage medium for storing at least one program, which when invoked, executes and implements the method according to any one of the embodiments of the three-dimensional data processing method described above in the present application, such as the three-dimensional data processing method described in the embodiment of fig. 11.

The present application also provides a computer-readable storage medium for storing at least one program, which when called, executes and implements the 3D printing method according to any one of the embodiments shown in fig. 12.

The three-dimensional data processing method or the 3D printing method provided by the application can be stored in a computer readable storage medium if the functions are realized in the form of software functional units and sold or used as independent products. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application.

In the embodiments provided herein, the computer-readable and writable storage medium may include read-only memory, random-access memory, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, flash memory, a USB flash drive, a removable hard disk, or any other medium that can be used to store desired program code in the form of instructions or data structures and that can be accessed by a computer. Also, any connection is properly termed a computer-readable medium. For example, if the instructions are transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. It should be understood, however, that computer-readable-writable storage media and data storage media do not include connections, carrier waves, signals, or other transitory media, but are intended to be non-transitory, tangible storage media. Disk and disc, as used in this application, includes Compact Disc (CD), laser disc, optical disc, Digital Versatile Disc (DVD), floppy disk and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers.

In one or more exemplary aspects, the functions described by the computer programs of the three-dimensional data processing method and the printing method of the 3D printing apparatus described herein may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. The steps of a method or algorithm disclosed herein may be embodied in a processor-executable software module, which may be located on a tangible, non-transitory computer-readable and/or writable storage medium. Tangible, non-transitory computer readable and writable storage media may be any available media that can be accessed by a computer.

The above embodiments are merely illustrative of the principles and utilities of the present application and are not intended to limit the application. Any person skilled in the art can modify or change the above-described embodiments without departing from the spirit and scope of the present application. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical concepts disclosed in the present application shall be covered by the claims of the present application.

Claims

1. A midsole for an article of footwear, the midsole consisting of a 3D printed topology or a plurality of lattice structures, comprising: the sole part is positioned between the heel part and the sole part and corresponds to the arch of the target user; the heel part and/or the sole part in the midsole is provided with at least one first foot pressing pre-region, and the topological structure or the lattice structure outside the first foot pressing pre-region is in gradual transition towards the topological structure or the lattice structure extending into the at least one first foot pressing pre-region, so that the stress intensity of the topological structure or the lattice structure in the at least one first foot pressing pre-region is smaller than that of the topological structure or the lattice structure outside the at least one first foot pressing pre-region.

2. The midsole for an article of footwear according to claim 1, wherein at least one second foot preparation area is provided in the midsole, the second foot preparation area being located in a heel, a ball, or a socket portion of the midsole; the topological structure or the lattice structure outside the second foot pressing pre-region is in gradual transition towards the topological structure or the lattice structure extending into the at least one second foot pressing pre-region, so that the stress intensity of the topological structure or the lattice structure in the at least one second foot pressing pre-region is greater than that of the topological structure or the lattice structure outside the at least one second foot pressing pre-region.

3. The midsole for an article of footwear according to claim 1, wherein the midsole maintains a predetermined thickness associated with at least one of measured body data, weight data, foot contour data, gait data, and foot pressure data of the target user.

4. The midsole for an article of footwear according to claim 1 or 2, wherein the force strength of the topological or lattice structure in the at least one first foot drying zone or/and second foot drying zone is correlated with calculated expected foot pressure data, wherein the expected foot pressure data is less than measured foot pressure data corresponding to the at least one first foot drying zone; the expected foot pressure data is greater than measured foot pressure data corresponding to the at least one second foot pressure intervention region.

5. The midsole for an article of footwear according to claim 4, wherein the desired foot pressure data is calculated based on measured foot pressure data of a target user obtained by measurement and corresponding medical intervention data.

6. The midsole for an article of footwear according to claim 1 or 2, wherein the force strength of the topological or lattice structure in the at least one first foot preparation area or/and second foot preparation area is correlated with the calculated expected foot pressure data and the measured foot shape profile data.

7. The midsole for an article of footwear according to claim 1 or 2, wherein the force strength of the topological or lattice structure in the at least one first foot preparation area or/and second foot preparation area is related to the calculated expected foot pressure data, the measured foot contour data, and the gait data.

8. The midsole for an article of footwear according to claim 1, wherein the waist recess portion has a ridge portion of a predetermined height to support the arch of a target user, the height of the ridge portion and the strength of force applied thereto being related to the desired foot pressure data and foot shape profile data and gait data of the target user obtained by calculation.

9. The midsole for an article of footwear according to claim 1, wherein the topology or lattice structure is obtained by 3D printing of one of filament melt extrusion, material droplet jetting, powder lay-up melting, adhesive jetting, or photosensitive resin laminate curing.

10. The midsole for an article of footwear according to claim 1, wherein the topological or lattice structure material comprises a light-cured resin material, a thermoplastic rubber (TPR), a thermoplastic elastomer; wherein the thermoplastic elastomer comprises polyurethane elastomer (TPU), nylon elastomer (TPAE), polyester elastomer (TPEE), EVA elastomer and organosilicon elastomer.

11. The midsole for an article of footwear according to claim 1 or 2, wherein the stress intensity of the lattice structure is determined by at least one of a bulk density, a lattice bulk structure, a printing material, a printing process, and a post-processing process of each lattice structure; or the stress intensity of the topological structure is determined by at least one of the volume density, the printing material, the printing process and the post-processing process of the topological structure.

12. The midsole for an article of footwear according to claim 11, wherein the lattice structure has a bulk density related to a rod diameter thickness, a lattice wall thickness, a lattice size, and a density of a lattice rod after molding; and the volume density of the topological structure is related to the thickness of the rod diameter of the topological structure, the thickness of the wall surface and the density of the rod body or the surface body of the formed topological structure.

13. The midsole for an article of footwear according to claim 1 or 2, wherein the gradual transition is formed by determining at least one of a bulk density, a lattice bulk structure, a printed material, a printing process, and a post-treatment process of the lattice structure outside the first foot preparation region toward the lattice structure inside the at least one first foot preparation region and/or at least one of a bulk density, a lattice bulk structure, a printed material, a printed process, and a post-treatment process of the lattice structure outside the second foot preparation region toward the lattice structure inside the at least one second foot preparation region.

14. The midsole for an article of footwear according to claim 1 or 2, wherein the gradual transition is formed by determining at least one of a bulk density of the topology outside the first foot preparation region towards the topology inside the at least one first foot preparation region, a printing material, a printing process, and a post-treatment process and/or at least one of a bulk density of the topology outside the second foot preparation region towards the topology inside the at least one second foot preparation region, a printing material, a printing process, and a post-treatment process.

15. The midsole for an article of footwear according to claim 1, further comprising an upper conforming surface for engaging an upper integrally formed on a top surface of the midsole by 3D printing.

16. The midsole for an article of footwear according to claim 15, further comprising a cushioning layer integrally formed by 3D printing between the midsole and the upper conforming surface.

17. The midsole for an article of footwear according to claim 1, further comprising a cushioning layer integrally formed by 3D printing on a top surface of the midsole.

18. The midsole for an article of footwear according to claim 16 or 17, wherein the buffer layer is comprised of a 3D printed topology or a plurality of lattice structures, the stem diameter of the topology in the buffer layer being smaller than the stem diameter of the topology in the midsole; or the rod diameter of the lattice structure in the buffer layer is smaller than that of the lattice structure in the midsole.

19. The midsole for an article of footwear according to claim 16 or 17, wherein the buffer layer is composed of a plurality of lattice structures printed in 3D, a diameter of a rod of a lattice structure in the buffer layer is smaller than a diameter of a rod of a lattice structure in the midsole, and a lattice volume of a lattice structure in the buffer layer is smaller than a lattice volume of a lattice structure in the midsole.

20. The midsole for an article of footwear according to claim 1, further comprising a lower conforming surface formed by 3D printing on a bottom of the midsole for bonding to an outsole.

21. The midsole for an article of footwear according to claim 1, wherein the lower conforming surface is of annular configuration along a bottom contour of the midsole.

22. The midsole for an article of footwear according to claim 1, wherein the geometry of the plurality of lattice structures printed by 3D has a periodicity, the lattice structures being in a tensile, torsional, or compressive deformation configuration at different locations.

23. The midsole for an article of footwear according to claim 22, wherein the geometric structure comprises a combination of one or more of a polyhedron, a face, a cone, a rhomboid, a star, and a spheroid.

24. An article of footwear comprising a midsole according to any one of claims 1 to 23, an upper coupled to a top periphery of the midsole for wrapping around a foot of an intended user, and an outsole coupled to a bottom of the midsole for contacting a ground surface.

25. The article of footwear according to claim 24, wherein the dimensional or relaxation of the upper is related to foot contour data of a target user and/or gait data of a target user obtained from measurements.

26. The article of footwear of claim 24, wherein the article of footwear is an orthopedic shoe.

27. The article of footwear of claim 26, wherein the orthopedic footwear is a diabetic foot footwear.

28. A method of three-dimensional data processing for a midsole for an article of footwear, the method comprising the steps of:

modeling a midsole of a target user to form a three-dimensional midsole model having a preset contour; the three-dimensional midsole model includes: the sole part is positioned between the heel part and the sole part and corresponds to the arch of the target user;

Processing the three-dimensional midsole model using the obtained foot pressure data and foot shape profile data for the target user to determine at least one first foot drying area in a heel and/or a ball portion of the three-dimensional midsole model;

weakening the stress intensity of the topological structure or the lattice structure in the at least one first foot drying area to be smaller than the stress intensity of the topological structure or the lattice structure outside the at least one first foot drying area;

processing the stress intensity of the topological structure or the lattice structure in the at least one first foot pressing pre-region and the stress intensity of the topological structure or the lattice structure outside the first foot pressing pre-region, so that the stress intensity of the topological structure or the lattice structure outside the first foot pressing pre-region is in gradual transition towards the change of the stress intensity of the topological structure or the lattice structure extending in the at least one first foot pressing pre-region;

three-dimensional slicing data of the midsole readable by a 3D printing device is formed.

29. The method of processing three-dimensional data for a midsole of an article of footwear according to claim 28, further comprising the steps of:

Processing the three-dimensional midsole model using the obtained foot pressure data and foot shape profile data of the target user to determine at least one second foot pressure intervention region in the three-dimensional midsole model;

strengthening the stress intensity of the topological structure or the crystal lattice structure in the at least one second foot pressing dry area to be larger than the stress intensity of the topological structure or the crystal lattice structure outside the at least one second foot pressing dry area;

and processing the stress intensity of the topological structure or the lattice structure in the at least one second foot pressing pre-region and the stress intensity of the topological structure or the lattice structure outside the second foot pressing pre-region, so that the stress intensity of the topological structure or the lattice structure outside the second foot pressing pre-region is in gradual transition towards the change of the stress intensity of the topological structure or the lattice structure extending in the at least one second foot pressing pre-region.

30. The method of processing three-dimensional data for a midsole of an article of footwear according to claim 28 or 29, further comprising a step of adjusting a preset thickness of the three-dimensional midsole model according to at least one of measured body data, weight data, foot shape profile data, gait data, and foot pressure data of the target user.

31. The method of three-dimensional data processing for a midsole of an article of footwear according to claim 28 or 29, wherein the foot pressure data and foot shape profile data of the target user are obtained through measurement or statistics.

32. The method of claim 28 or 29, wherein the force strength of the topological structure or lattice structure in the at least one first foot preparation area or/and the second foot preparation area is correlated to the calculated expected foot pressure data, which is less than the measured foot pressure data corresponding to the at least one first foot preparation area; the expected foot pressure data is greater than measured foot pressure data corresponding to the at least one second foot pressure intervention region.

33. The method of processing three-dimensional data for a midsole of an article of footwear according to claim 32, wherein the desired foot pressure data is calculated based on measured foot pressure data of a target user obtained by measurement and corresponding medical intervention data.

34. The method of processing three-dimensional data for a midsole of an article of footwear according to claim 28 or 29, wherein the step of weakening the stress intensity of the topology or lattice structure in the at least one first foot preparation region or the step of strengthening the stress intensity of the topology or lattice structure in the at least one second foot preparation region, the stress intensity of the topology or lattice structure in the at least one first foot preparation region or/and second foot preparation region is correlated with the desired foot pressure data obtained by calculation and the foot shape profile data obtained by measurement.

35. The method of claim 28 or 29, wherein the step of weakening the stress of the topology or lattice structure in the at least one first foot preparation area or strengthening the stress of the topology or lattice structure in the at least one second foot preparation area correlates with the calculated expected foot pressure data and the measured foot shape profile data, and the gait data.

36. The method of processing three-dimensional data for a midsole of an article of footwear according to claim 28, further comprising the step of determining a height of the raised portion of the waist-socket portion and a force intensity thereof; wherein the height of the raised part of the waist socket part and the stress intensity thereof are related to the expected foot pressure data and foot shape contour data and gait data of the target user obtained by calculation.

37. The method of three-dimensional data processing for a midsole of an article of footwear according to claim 28, further comprising the step of building a top-fit model on a top surface of the three-dimensional midsole model.

38. The method of processing three-dimensional data for a midsole of an article of footwear according to claim 37, further comprising a step of constructing a buffer layer model between the three-dimensional midsole model and the upper fitted surface model using a plurality of basic cells that are preset in a lattice structure or using a topological structure.

39. The method of processing three-dimensional data for a midsole of an article of footwear according to claim 28, further comprising the step of constructing a cushioning layer model on a top surface of the three-dimensional midsole model.

40. The method of processing three-dimensional data for a midsole of an article of footwear according to claim 28, further comprising the step of constructing a lower conforming surface model on a bottom surface of the three-dimensional midsole model.

41. The method of three-dimensional data processing for a midsole of an article of footwear according to claim 28, wherein the step of modeling the midsole of the target user has the lattice structure in a tensile, torsional, or compressive deformation structure at different locations of the three-dimensional midsole model.

42. The method of claim 28, wherein the geometry of the lattice structure comprises a combination of one or more of polyhedrons, planar bodies, pyramidal bodies, rhombohedrons, star-shaped bodies, and spheroids.

43. A3D printing method applied to a 3D printing device, the 3D printing device comprising: an energy radiation device for radiating energy to a printing surface, and a component platform for carrying a three-dimensional object cured by energy radiation, wherein the 3D printing method comprises the following steps:

reading midsole three-dimensional slice data obtained by processing in the method for processing midsole three-dimensional data for an article of footwear according to any one of claims 28 to 42;

adjusting the spacing between the component platform and the print surface to fill the print surface with material to be cured; wherein the thickness of the filled material to be solidified corresponds to the slice layer height of the three-dimensional slice data of the insole;

radiating energy to the filled material to be cured based on the midsole three-dimensional slice data to obtain a corresponding pattern cured layer;

repeating the above steps to accumulate the patterned cured layer on the member platform to form a midsole for the article of footwear corresponding to the three-dimensional midsole model.

44. A computer device, comprising:

a storage device for storing at least one program, and a three-dimensional midsole model;

processing means, coupled to said storage means, for executing said at least one program to invoke execution of said at least one program in said storage means and implement a method of three-dimensional data processing for a midsole of an article of footwear according to any of claims 28-42.

45. A computer-readable storage medium, characterized by storing at least one program which, when executed by a processor, implements the method of three-dimensional data processing for a midsole of an article of footwear according to any one of claims 28 to 42.